/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/cohendiv-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 21:59:33,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 21:59:33,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 21:59:33,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 21:59:33,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 21:59:33,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 21:59:33,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 21:59:33,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 21:59:33,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 21:59:33,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 21:59:33,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 21:59:33,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 21:59:33,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 21:59:33,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 21:59:33,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 21:59:33,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 21:59:33,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 21:59:33,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 21:59:33,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 21:59:33,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 21:59:33,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 21:59:33,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 21:59:33,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 21:59:33,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 21:59:33,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 21:59:33,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 21:59:33,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 21:59:33,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 21:59:33,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 21:59:33,204 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 21:59:33,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 21:59:33,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 21:59:33,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 21:59:33,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 21:59:33,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 21:59:33,206 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 21:59:33,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 21:59:33,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 21:59:33,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 21:59:33,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 21:59:33,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 21:59:33,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:59:33,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 21:59:33,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 21:59:33,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 21:59:33,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 21:59:33,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 21:59:33,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 21:59:33,210 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 21:59:33,210 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 21:59:33,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 21:59:33,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 21:59:33,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 21:59:33,409 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 21:59:33,409 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 21:59:33,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2022-02-23 21:59:33,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9830f6b/c42f4e7ac75a491d8c32161df68ca030/FLAGad4ecd882 [2022-02-23 21:59:33,772 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 21:59:33,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2022-02-23 21:59:33,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9830f6b/c42f4e7ac75a491d8c32161df68ca030/FLAGad4ecd882 [2022-02-23 21:59:34,213 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d9830f6b/c42f4e7ac75a491d8c32161df68ca030 [2022-02-23 21:59:34,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 21:59:34,216 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 21:59:34,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 21:59:34,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 21:59:34,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 21:59:34,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2a9334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34, skipping insertion in model container [2022-02-23 21:59:34,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 21:59:34,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 21:59:34,354 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/cohendiv-ll_unwindbound20.c[576,589] [2022-02-23 21:59:34,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:59:34,371 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 21:59:34,378 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/cohendiv-ll_unwindbound20.c[576,589] [2022-02-23 21:59:34,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:59:34,391 INFO L208 MainTranslator]: Completed translation [2022-02-23 21:59:34,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34 WrapperNode [2022-02-23 21:59:34,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 21:59:34,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 21:59:34,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 21:59:34,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 21:59:34,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 21:59:34,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 21:59:34,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 21:59:34,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 21:59:34,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:59:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:34,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 21:59:34,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 21:59:34,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 21:59:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 21:59:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 21:59:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 21:59:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 21:59:34,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 21:59:34,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 21:59:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 21:59:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 21:59:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 21:59:34,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 21:59:34,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 21:59:34,532 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 21:59:34,533 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 21:59:34,665 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 21:59:34,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 21:59:34,670 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 21:59:34,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:59:34 BoogieIcfgContainer [2022-02-23 21:59:34,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 21:59:34,671 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 21:59:34,672 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 21:59:34,672 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 21:59:34,674 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:59:34" (1/1) ... [2022-02-23 21:59:34,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:59:34 BasicIcfg [2022-02-23 21:59:34,688 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 21:59:34,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 21:59:34,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 21:59:34,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 21:59:34,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 09:59:34" (1/4) ... [2022-02-23 21:59:34,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6332ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:59:34, skipping insertion in model container [2022-02-23 21:59:34,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:59:34" (2/4) ... [2022-02-23 21:59:34,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6332ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:59:34, skipping insertion in model container [2022-02-23 21:59:34,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:59:34" (3/4) ... [2022-02-23 21:59:34,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6332ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 09:59:34, skipping insertion in model container [2022-02-23 21:59:34,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:59:34" (4/4) ... [2022-02-23 21:59:34,693 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.cqvasr [2022-02-23 21:59:34,697 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 21:59:34,697 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 21:59:34,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 21:59:34,731 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 21:59:34,732 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 21:59:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-23 21:59:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 21:59:34,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:34,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:34,757 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2022-02-23 21:59:34,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:34,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718371139] [2022-02-23 21:59:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:34,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:59:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:34,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 21:59:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:59:34,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:34,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718371139] [2022-02-23 21:59:34,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718371139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:59:34,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:59:34,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 21:59:34,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648766023] [2022-02-23 21:59:34,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:59:34,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 21:59:34,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 21:59:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 21:59:34,930 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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) [2022-02-23 21:59:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:35,030 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-02-23 21:59:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 21:59:35,032 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 [2022-02-23 21:59:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:35,038 INFO L225 Difference]: With dead ends: 68 [2022-02-23 21:59:35,038 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 21:59:35,041 INFO L932 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 [2022-02-23 21:59:35,048 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:35,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:59:35,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 21:59:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-02-23 21:59:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 21:59:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-02-23 21:59:35,092 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2022-02-23 21:59:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:35,092 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-02-23 21:59:35,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2022-02-23 21:59:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-02-23 21:59:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 21:59:35,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:35,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:35,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 21:59:35,094 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2022-02-23 21:59:35,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:35,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045115724] [2022-02-23 21:59:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:35,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:35,113 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:35,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359278209] [2022-02-23 21:59:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:35,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:35,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:35,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 21:59:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 21:59:35,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:59:35,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 21:59:35,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:35,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045115724] [2022-02-23 21:59:35,268 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:35,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359278209] [2022-02-23 21:59:35,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359278209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:59:35,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:59:35,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 21:59:35,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648256588] [2022-02-23 21:59:35,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:59:35,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 21:59:35,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 21:59:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 21:59:35,271 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:59:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:35,282 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-02-23 21:59:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 21:59:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-23 21:59:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:35,284 INFO L225 Difference]: With dead ends: 42 [2022-02-23 21:59:35,284 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 21:59:35,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 21:59:35,285 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:35,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:59:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 21:59:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 21:59:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 21:59:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 21:59:35,291 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2022-02-23 21:59:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:35,292 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 21:59:35,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:59:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 21:59:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 21:59:35,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:35,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:35,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:35,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:35,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2022-02-23 21:59:35,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:35,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928033485] [2022-02-23 21:59:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:35,561 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:35,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462348204] [2022-02-23 21:59:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:35,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:35,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:35,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:35,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 21:59:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 21:59:35,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:59:35,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 21:59:35,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:35,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928033485] [2022-02-23 21:59:35,703 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:35,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462348204] [2022-02-23 21:59:35,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462348204] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:59:35,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:59:35,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 21:59:35,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793030018] [2022-02-23 21:59:35,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:59:35,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 21:59:35,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 21:59:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:59:35,704 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 21:59:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:35,753 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-02-23 21:59:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 21:59:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-23 21:59:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:35,754 INFO L225 Difference]: With dead ends: 45 [2022-02-23 21:59:35,754 INFO L226 Difference]: Without dead ends: 43 [2022-02-23 21:59:35,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 21:59:35,755 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:35,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 149 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:59:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-23 21:59:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-02-23 21:59:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 21:59:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-02-23 21:59:35,762 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2022-02-23 21:59:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:35,762 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-02-23 21:59:35,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 21:59:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-02-23 21:59:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 21:59:35,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:35,767 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:35,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:35,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 21:59:35,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2022-02-23 21:59:35,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:35,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210536803] [2022-02-23 21:59:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:35,996 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:35,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206474086] [2022-02-23 21:59:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:35,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:35,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:35,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 21:59:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 21:59:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:59:36,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 21:59:36,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:36,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210536803] [2022-02-23 21:59:36,108 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:36,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206474086] [2022-02-23 21:59:36,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206474086] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:59:36,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:59:36,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 21:59:36,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987622046] [2022-02-23 21:59:36,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:59:36,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 21:59:36,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:36,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 21:59:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:59:36,112 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-02-23 21:59:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:36,162 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-02-23 21:59:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 21:59:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 23 [2022-02-23 21:59:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:36,165 INFO L225 Difference]: With dead ends: 58 [2022-02-23 21:59:36,165 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 21:59:36,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 21:59:36,167 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:36,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:59:36,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 21:59:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-02-23 21:59:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 21:59:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2022-02-23 21:59:36,174 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2022-02-23 21:59:36,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:36,174 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2022-02-23 21:59:36,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-02-23 21:59:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2022-02-23 21:59:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 21:59:36,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:36,175 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:36,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:36,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:36,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2022-02-23 21:59:36,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:36,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75601535] [2022-02-23 21:59:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:36,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:36,404 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:36,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685178930] [2022-02-23 21:59:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:36,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:36,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:36,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:36,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 21:59:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 21:59:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 21:59:36,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 21:59:36,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:36,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75601535] [2022-02-23 21:59:36,508 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:36,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685178930] [2022-02-23 21:59:36,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685178930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:59:36,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:59:36,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 21:59:36,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384548095] [2022-02-23 21:59:36,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:59:36,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 21:59:36,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 21:59:36,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:59:36,509 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 21:59:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:36,554 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2022-02-23 21:59:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 21:59:36,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2022-02-23 21:59:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:36,556 INFO L225 Difference]: With dead ends: 83 [2022-02-23 21:59:36,556 INFO L226 Difference]: Without dead ends: 81 [2022-02-23 21:59:36,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 21:59:36,557 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:36,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:59:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-23 21:59:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-02-23 21:59:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 21:59:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-02-23 21:59:36,565 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2022-02-23 21:59:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:36,565 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-02-23 21:59:36,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-02-23 21:59:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-02-23 21:59:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 21:59:36,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:36,566 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:36,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:36,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:36,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2022-02-23 21:59:36,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:36,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416257804] [2022-02-23 21:59:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:36,788 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:36,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839743778] [2022-02-23 21:59:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:36,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:36,795 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:36,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 21:59:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:36,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 21:59:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 21:59:36,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 21:59:36,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:36,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416257804] [2022-02-23 21:59:36,886 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:36,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839743778] [2022-02-23 21:59:36,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839743778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:59:36,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:59:36,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 21:59:36,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373817533] [2022-02-23 21:59:36,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:59:36,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 21:59:36,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 21:59:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:59:36,887 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 21:59:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:36,906 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2022-02-23 21:59:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 21:59:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2022-02-23 21:59:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:36,908 INFO L225 Difference]: With dead ends: 113 [2022-02-23 21:59:36,908 INFO L226 Difference]: Without dead ends: 78 [2022-02-23 21:59:36,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 21:59:36,909 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:36,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:59:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-23 21:59:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-02-23 21:59:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 21:59:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2022-02-23 21:59:36,917 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2022-02-23 21:59:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:36,918 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2022-02-23 21:59:36,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 21:59:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2022-02-23 21:59:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 21:59:36,919 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:36,919 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:36,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:37,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:37,140 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2022-02-23 21:59:37,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:37,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124296983] [2022-02-23 21:59:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:37,160 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:37,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785647394] [2022-02-23 21:59:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:37,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:37,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:37,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 21:59:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:37,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 21:59:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 21:59:37,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 21:59:37,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:37,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124296983] [2022-02-23 21:59:37,316 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:37,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785647394] [2022-02-23 21:59:37,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785647394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:59:37,316 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:59:37,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 21:59:37,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798676379] [2022-02-23 21:59:37,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:59:37,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 21:59:37,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 21:59:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-23 21:59:37,317 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 21:59:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:37,375 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-02-23 21:59:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 21:59:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-02-23 21:59:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:37,376 INFO L225 Difference]: With dead ends: 84 [2022-02-23 21:59:37,376 INFO L226 Difference]: Without dead ends: 82 [2022-02-23 21:59:37,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 21:59:37,377 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:37,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 203 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:59:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-23 21:59:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-23 21:59:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 21:59:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-02-23 21:59:37,385 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2022-02-23 21:59:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:37,385 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-02-23 21:59:37,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 21:59:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-02-23 21:59:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 21:59:37,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:37,386 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:37,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:37,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:37,599 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2022-02-23 21:59:37,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:37,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35922767] [2022-02-23 21:59:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:37,607 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:37,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714177844] [2022-02-23 21:59:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:37,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:37,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:37,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:37,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 21:59:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 21:59:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 21:59:37,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:59:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 21:59:37,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:37,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35922767] [2022-02-23 21:59:37,952 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:37,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714177844] [2022-02-23 21:59:37,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714177844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:59:37,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 21:59:37,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-23 21:59:37,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122197179] [2022-02-23 21:59:37,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 21:59:37,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 21:59:37,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 21:59:37,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-23 21:59:37,954 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-23 21:59:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:38,041 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-02-23 21:59:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 21:59:38,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 47 [2022-02-23 21:59:38,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:38,042 INFO L225 Difference]: With dead ends: 88 [2022-02-23 21:59:38,042 INFO L226 Difference]: Without dead ends: 86 [2022-02-23 21:59:38,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-23 21:59:38,043 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:38,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 137 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:59:38,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-23 21:59:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-23 21:59:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-23 21:59:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-02-23 21:59:38,051 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2022-02-23 21:59:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:38,051 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-02-23 21:59:38,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-02-23 21:59:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-02-23 21:59:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 21:59:38,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:38,052 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:38,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:38,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:38,267 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:38,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2022-02-23 21:59:38,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:38,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495528241] [2022-02-23 21:59:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:38,275 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:38,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114855807] [2022-02-23 21:59:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:38,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:38,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:38,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:38,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 21:59:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:38,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 21:59:38,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 21:59:38,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:59:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 21:59:38,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:38,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495528241] [2022-02-23 21:59:38,545 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:38,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114855807] [2022-02-23 21:59:38,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114855807] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:59:38,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 21:59:38,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 21:59:38,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450480173] [2022-02-23 21:59:38,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 21:59:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 21:59:38,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 21:59:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 21:59:38,546 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 21:59:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:38,679 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-02-23 21:59:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 21:59:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-02-23 21:59:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:38,681 INFO L225 Difference]: With dead ends: 257 [2022-02-23 21:59:38,681 INFO L226 Difference]: Without dead ends: 250 [2022-02-23 21:59:38,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-23 21:59:38,682 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 102 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:38,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 220 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:59:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-23 21:59:38,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 239. [2022-02-23 21:59:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 153 states have (on average 1.1895424836601307) internal successors, (182), 161 states have internal predecessors, (182), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-02-23 21:59:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 291 transitions. [2022-02-23 21:59:38,698 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 291 transitions. Word has length 50 [2022-02-23 21:59:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:38,698 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 291 transitions. [2022-02-23 21:59:38,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 21:59:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 291 transitions. [2022-02-23 21:59:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 21:59:38,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:38,699 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:38,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:38,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 21:59:38,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2022-02-23 21:59:38,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:38,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212026252] [2022-02-23 21:59:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:38,924 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:38,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215446035] [2022-02-23 21:59:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:38,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:38,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:38,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:38,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 21:59:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-23 21:59:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 21:59:39,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:59:39,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:39,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212026252] [2022-02-23 21:59:39,462 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:39,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215446035] [2022-02-23 21:59:39,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215446035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:59:39,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 21:59:39,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-23 21:59:39,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047862969] [2022-02-23 21:59:39,462 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 21:59:39,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 21:59:39,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:39,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 21:59:39,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-23 21:59:39,463 INFO L87 Difference]: Start difference. First operand 239 states and 291 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 21:59:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:39,621 INFO L93 Difference]: Finished difference Result 318 states and 381 transitions. [2022-02-23 21:59:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 21:59:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-02-23 21:59:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:39,623 INFO L225 Difference]: With dead ends: 318 [2022-02-23 21:59:39,623 INFO L226 Difference]: Without dead ends: 203 [2022-02-23 21:59:39,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-02-23 21:59:39,624 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:39,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 227 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:59:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-23 21:59:39,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-02-23 21:59:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 136 states have internal predecessors, (152), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 21:59:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-02-23 21:59:39,648 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 55 [2022-02-23 21:59:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:39,648 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-02-23 21:59:39,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 21:59:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-02-23 21:59:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-23 21:59:39,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:39,649 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:39,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:39,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 21:59:39,865 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:39,865 INFO L85 PathProgramCache]: Analyzing trace with hash 136506131, now seen corresponding path program 1 times [2022-02-23 21:59:39,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:39,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818316983] [2022-02-23 21:59:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:39,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:39,872 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:39,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457167824] [2022-02-23 21:59:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:39,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:39,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:39,874 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:39,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 21:59:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 21:59:39,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-23 21:59:40,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:59:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-23 21:59:40,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:40,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818316983] [2022-02-23 21:59:40,141 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:40,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457167824] [2022-02-23 21:59:40,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457167824] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:59:40,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 21:59:40,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 21:59:40,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704573805] [2022-02-23 21:59:40,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 21:59:40,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 21:59:40,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:40,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 21:59:40,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 21:59:40,142 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-23 21:59:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:40,277 INFO L93 Difference]: Finished difference Result 308 states and 368 transitions. [2022-02-23 21:59:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 21:59:40,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 63 [2022-02-23 21:59:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:40,279 INFO L225 Difference]: With dead ends: 308 [2022-02-23 21:59:40,279 INFO L226 Difference]: Without dead ends: 214 [2022-02-23 21:59:40,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-23 21:59:40,280 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 130 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:40,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 206 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:59:40,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-23 21:59:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2022-02-23 21:59:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 46 states have call successors, (46), 26 states have call predecessors, (46), 25 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 21:59:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-02-23 21:59:40,291 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 63 [2022-02-23 21:59:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:40,291 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-02-23 21:59:40,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 8 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-02-23 21:59:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-02-23 21:59:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-23 21:59:40,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:59:40,292 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:40,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:40,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 21:59:40,509 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:59:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:59:40,509 INFO L85 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2022-02-23 21:59:40,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:59:40,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427031077] [2022-02-23 21:59:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:40,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:59:40,516 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 21:59:40,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520854899] [2022-02-23 21:59:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:59:40,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:59:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:59:40,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:59:40,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 21:59:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:59:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-23 21:59:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:59:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 21:59:40,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:59:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-23 21:59:40,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:59:40,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427031077] [2022-02-23 21:59:40,992 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 21:59:40,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520854899] [2022-02-23 21:59:40,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520854899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:59:40,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 21:59:40,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-23 21:59:40,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585429567] [2022-02-23 21:59:40,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 21:59:40,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 21:59:40,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:59:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 21:59:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-23 21:59:40,994 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 21:59:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:59:41,360 INFO L93 Difference]: Finished difference Result 236 states and 272 transitions. [2022-02-23 21:59:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 21:59:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 79 [2022-02-23 21:59:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:59:41,360 INFO L225 Difference]: With dead ends: 236 [2022-02-23 21:59:41,360 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 21:59:41,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-23 21:59:41,361 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 21:59:41,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 354 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 21:59:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 21:59:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 21:59:41,362 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) [2022-02-23 21:59:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 21:59:41,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-02-23 21:59:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:59:41,362 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 21:59:41,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 8 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 21:59:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 21:59:41,362 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 21:59:41,364 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 21:59:41,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 21:59:41,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 21:59:41,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-23 21:59:42,189 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-23 21:59:42,189 INFO L854 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L854 garLoopResultBuilder]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-02-23 21:59:42,189 INFO L854 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-02-23 21:59:42,189 INFO L858 garLoopResultBuilder]: For program point L30-1(line 30) no Hoare annotation was computed. [2022-02-23 21:59:42,189 INFO L854 garLoopResultBuilder]: At program point L37-3(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 21:59:42,189 INFO L854 garLoopResultBuilder]: At program point L37-4(lines 37 61) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~x~0 main_~r~0) (= main_~q~0 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L63(line 63) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0)))) [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L39(lines 37 61) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L854 garLoopResultBuilder]: At program point L46-3(lines 46 58) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 21:59:42,190 INFO L854 garLoopResultBuilder]: At program point L47-1(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 21:59:42,190 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L49(lines 46 58) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L54-1(line 54) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2022-02-23 21:59:42,190 INFO L854 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 main_~y~0))) (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 21:59:42,190 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (or (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) (not (<= |old(~counter~0)| 0))) [2022-02-23 21:59:42,190 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-02-23 21:59:42,190 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-02-23 21:59:42,191 INFO L858 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-02-23 21:59:42,191 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-02-23 21:59:42,191 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-02-23 21:59:42,191 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-02-23 21:59:42,193 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:59:42,194 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 21:59:42,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 09:59:42 BasicIcfg [2022-02-23 21:59:42,203 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 21:59:42,203 INFO L158 Benchmark]: Toolchain (without parser) took 7987.77ms. Allocated memory was 202.4MB in the beginning and 277.9MB in the end (delta: 75.5MB). Free memory was 144.5MB in the beginning and 230.0MB in the end (delta: -85.5MB). Peak memory consumption was 128.2MB. Max. memory is 8.0GB. [2022-02-23 21:59:42,203 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 202.4MB. Free memory is still 160.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 21:59:42,204 INFO L158 Benchmark]: CACSL2BoogieTranslator took 174.79ms. Allocated memory was 202.4MB in the beginning and 277.9MB in the end (delta: 75.5MB). Free memory was 144.3MB in the beginning and 249.5MB in the end (delta: -105.2MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-02-23 21:59:42,204 INFO L158 Benchmark]: Boogie Preprocessor took 19.54ms. Allocated memory is still 277.9MB. Free memory was 249.5MB in the beginning and 247.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 21:59:42,204 INFO L158 Benchmark]: RCFGBuilder took 258.96ms. Allocated memory is still 277.9MB. Free memory was 247.9MB in the beginning and 235.9MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 21:59:42,204 INFO L158 Benchmark]: IcfgTransformer took 16.43ms. Allocated memory is still 277.9MB. Free memory was 235.9MB in the beginning and 234.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 21:59:42,204 INFO L158 Benchmark]: TraceAbstraction took 7513.94ms. Allocated memory is still 277.9MB. Free memory was 234.3MB in the beginning and 230.0MB in the end (delta: 4.3MB). Peak memory consumption was 142.7MB. Max. memory is 8.0GB. [2022-02-23 21:59:42,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 202.4MB. Free memory is still 160.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 174.79ms. Allocated memory was 202.4MB in the beginning and 277.9MB in the end (delta: 75.5MB). Free memory was 144.3MB in the beginning and 249.5MB in the end (delta: -105.2MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.54ms. Allocated memory is still 277.9MB. Free memory was 249.5MB in the beginning and 247.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 258.96ms. Allocated memory is still 277.9MB. Free memory was 247.9MB in the beginning and 235.9MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 16.43ms. Allocated memory is still 277.9MB. Free memory was 235.9MB in the beginning and 234.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 7513.94ms. Allocated memory is still 277.9MB. Free memory was 234.3MB in the beginning and 230.0MB in the end (delta: 4.3MB). Peak memory consumption was 142.7MB. 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.5s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 451 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 427 mSDsluCounter, 2096 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1568 mSDsCounter, 277 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 957 IncrementalHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 277 mSolverCounterUnsat, 528 mSDtfsCounter, 957 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 653 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=9, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 16 LocationsWithAnnotation, 129 PreInvPairs, 200 NumberOfFragments, 250 HoareAnnotationTreeSize, 129 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 16 FomulaSimplificationsInter, 2803 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 476 NumberOfCodeBlocks, 476 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 699 ConstructedInterpolants, 0 QuantifiedInterpolants, 1996 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1473 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 861/960 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: 46]: Loop Invariant Derived loop invariant: (((q * y + r == x && 1 <= r) && 1 <= y) && b == a * y) || !(\old(counter) <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || ((q * y + r == x && 1 <= y) && b == a * y) RESULT: Ultimate proved your program to be correct! [2022-02-23 21:59:42,219 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...