/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 09:42:03,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 09:42:03,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 09:42:03,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 09:42:03,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 09:42:03,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 09:42:03,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 09:42:03,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 09:42:03,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 09:42:03,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 09:42:03,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 09:42:03,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 09:42:03,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 09:42:03,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 09:42:03,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 09:42:03,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 09:42:03,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 09:42:03,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 09:42:03,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 09:42:03,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 09:42:03,789 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 09:42:03,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 09:42:03,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 09:42:03,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 09:42:03,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 09:42:03,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-19 09:42:03,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-19 09:42:03,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-19 09:42:03,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-19 09:42:03,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-19 09:42:03,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-19 09:42:03,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-19 09:42:03,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-19 09:42:03,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-19 09:42:03,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-19 09:42:03,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-19 09:42:03,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-19 09:42:03,805 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-19 09:42:03,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-19 09:42:03,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 09:42:03,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 09:42:03,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 09:42:03,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 09:42:03,817 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 09:42:03,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 09:42:03,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 09:42:03,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 09:42:03,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 09:42:03,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 09:42:03,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 09:42:03,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 09:42:03,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 09:42:03,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 09:42:03,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 09:42:03,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 09:42:03,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 09:42:03,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 09:42:03,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 09:42:03,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:42:03,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 09:42:03,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 09:42:03,822 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 09:42:03,822 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 09:42:03,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 09:42:03,822 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 09:42:03,822 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 09:42:04,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 09:42:04,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 09:42:04,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 09:42:04,085 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 09:42:04,086 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 09:42:04,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound10.c [2022-03-19 09:42:04,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79e1b0a3/b8a069a1a1f347f1bbb54664e6b3f6ed/FLAG4eb941344 [2022-03-19 09:42:04,561 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 09:42:04,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound10.c [2022-03-19 09:42:04,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79e1b0a3/b8a069a1a1f347f1bbb54664e6b3f6ed/FLAG4eb941344 [2022-03-19 09:42:04,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b79e1b0a3/b8a069a1a1f347f1bbb54664e6b3f6ed [2022-03-19 09:42:04,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 09:42:04,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 09:42:04,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 09:42:04,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 09:42:04,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 09:42:04,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:42:04" (1/1) ... [2022-03-19 09:42:04,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c99e682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:04, skipping insertion in model container [2022-03-19 09:42:04,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:42:04" (1/1) ... [2022-03-19 09:42:04,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 09:42:04,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 09:42:05,131 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_valuebound10.c[576,589] [2022-03-19 09:42:05,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:42:05,151 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 09:42:05,161 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_valuebound10.c[576,589] [2022-03-19 09:42:05,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 09:42:05,177 INFO L208 MainTranslator]: Completed translation [2022-03-19 09:42:05,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05 WrapperNode [2022-03-19 09:42:05,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 09:42:05,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 09:42:05,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 09:42:05,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 09:42:05,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 09:42:05,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 09:42:05,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 09:42:05,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 09:42:05,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (1/1) ... [2022-03-19 09:42:05,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 09:42:05,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:05,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 09:42:05,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 09:42:05,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 09:42:05,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 09:42:05,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 09:42:05,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 09:42:05,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 09:42:05,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 09:42:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 09:42:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 09:42:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 09:42:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 09:42:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 09:42:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 09:42:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 09:42:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 09:42:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 09:42:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 09:42:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 09:42:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 09:42:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 09:42:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 09:42:05,334 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 09:42:05,336 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 09:42:05,484 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 09:42:05,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 09:42:05,506 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 09:42:05,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:42:05 BoogieIcfgContainer [2022-03-19 09:42:05,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 09:42:05,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 09:42:05,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 09:42:05,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 09:42:05,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:42:04" (1/3) ... [2022-03-19 09:42:05,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2525e439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:42:05, skipping insertion in model container [2022-03-19 09:42:05,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:42:05" (2/3) ... [2022-03-19 09:42:05,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2525e439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:42:05, skipping insertion in model container [2022-03-19 09:42:05,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:42:05" (3/3) ... [2022-03-19 09:42:05,528 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound10.c [2022-03-19 09:42:05,532 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 09:42:05,532 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 09:42:05,581 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 09:42:05,589 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 09:42:05,590 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 09:42:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 09:42:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 09:42:05,618 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:05,618 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:05,619 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:05,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2022-03-19 09:42:05,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:05,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467244106] [2022-03-19 09:42:05,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 2 times [2022-03-19 09:42:05,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:05,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395626308] [2022-03-19 09:42:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:05,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:42:05,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 09:42:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:42:05,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 09:42:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:42:05,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 09:42:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:42:05,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 09:42:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 09:42:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 09:42:05,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395626308] [2022-03-19 09:42:05,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395626308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:05,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:05,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:42:05,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:05,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467244106] [2022-03-19 09:42:05,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467244106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:05,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:05,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 09:42:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799685478] [2022-03-19 09:42:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:05,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 09:42:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 09:42:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:42:05,900 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:42:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:05,968 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2022-03-19 09:42:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 09:42:05,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 09:42:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:05,977 INFO L225 Difference]: With dead ends: 71 [2022-03-19 09:42:05,977 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 09:42:05,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 09:42:05,982 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:05,985 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:42:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 09:42:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-19 09:42:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 09:42:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-19 09:42:06,041 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2022-03-19 09:42:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:06,042 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-19 09:42:06,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 09:42:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-19 09:42:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 09:42:06,043 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:06,043 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:06,044 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 09:42:06,044 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2022-03-19 09:42:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:06,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21471667] [2022-03-19 09:42:06,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 2 times [2022-03-19 09:42:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:06,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536770893] [2022-03-19 09:42:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:06,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:06,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245865689] [2022-03-19 09:42:06,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:42:06,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:06,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:06,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:06,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 09:42:06,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 09:42:06,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 09:42:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 09:42:06,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:42:06,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536770893] [2022-03-19 09:42:06,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:06,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245865689] [2022-03-19 09:42:06,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245865689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:06,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:06,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:42:06,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:06,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21471667] [2022-03-19 09:42:06,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21471667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:06,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:06,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:42:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898790809] [2022-03-19 09:42:06,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:06,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 09:42:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 09:42:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 09:42:06,344 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 09:42:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:06,403 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-03-19 09:42:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 09:42:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 09:42:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:06,406 INFO L225 Difference]: With dead ends: 45 [2022-03-19 09:42:06,406 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 09:42:06,407 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:42:06,408 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 153 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 [2022-03-19 09:42:06,408 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:42:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 09:42:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-03-19 09:42:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 09:42:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-19 09:42:06,427 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2022-03-19 09:42:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:06,428 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-19 09:42:06,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 09:42:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-19 09:42:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 09:42:06,428 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:06,428 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:06,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:06,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:06,629 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2022-03-19 09:42:06,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:06,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157304665] [2022-03-19 09:42:06,631 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 2 times [2022-03-19 09:42:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507314884] [2022-03-19 09:42:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:06,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:06,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649432880] [2022-03-19 09:42:06,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:42:06,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:06,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:06,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:06,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 09:42:06,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:42:06,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 09:42:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 09:42:06,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:42:06,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:06,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507314884] [2022-03-19 09:42:06,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:06,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649432880] [2022-03-19 09:42:06,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649432880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:06,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:06,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 09:42:06,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:06,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157304665] [2022-03-19 09:42:06,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157304665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:06,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:06,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 09:42:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965178313] [2022-03-19 09:42:06,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:06,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 09:42:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 09:42:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-19 09:42:06,854 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:42:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:06,959 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-03-19 09:42:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 09:42:06,960 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2022-03-19 09:42:06,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:06,961 INFO L225 Difference]: With dead ends: 57 [2022-03-19 09:42:06,961 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 09:42:06,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 09:42:06,962 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:06,963 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 198 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:42:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 09:42:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-19 09:42:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 09:42:06,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-03-19 09:42:06,974 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2022-03-19 09:42:06,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:06,974 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-03-19 09:42:06,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 09:42:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-03-19 09:42:06,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-19 09:42:06,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:06,976 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:07,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:07,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 09:42:07,192 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2022-03-19 09:42:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:07,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [251897416] [2022-03-19 09:42:07,193 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 2 times [2022-03-19 09:42:07,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:07,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836330116] [2022-03-19 09:42:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:07,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:07,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276300085] [2022-03-19 09:42:07,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:42:07,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:07,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:07,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:07,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 09:42:07,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:42:07,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 09:42:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 09:42:07,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:42:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836330116] [2022-03-19 09:42:07,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:07,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276300085] [2022-03-19 09:42:07,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276300085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:07,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:07,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:42:07,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:07,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [251897416] [2022-03-19 09:42:07,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [251897416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:07,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:07,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:42:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783849284] [2022-03-19 09:42:07,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:07,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 09:42:07,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 09:42:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 09:42:07,347 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 09:42:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:07,407 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-03-19 09:42:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 09:42:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2022-03-19 09:42:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:07,411 INFO L225 Difference]: With dead ends: 79 [2022-03-19 09:42:07,411 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 09:42:07,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:42:07,416 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:07,416 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:42:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 09:42:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-19 09:42:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 09:42:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2022-03-19 09:42:07,452 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2022-03-19 09:42:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:07,453 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2022-03-19 09:42:07,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 09:42:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2022-03-19 09:42:07,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 09:42:07,455 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:07,456 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:07,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:07,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:07,668 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 1 times [2022-03-19 09:42:07,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:07,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240541389] [2022-03-19 09:42:07,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -391974204, now seen corresponding path program 2 times [2022-03-19 09:42:07,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:07,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422059723] [2022-03-19 09:42:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:07,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:07,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:07,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421255102] [2022-03-19 09:42:07,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:42:07,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:07,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:07,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:07,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 09:42:07,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:42:07,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 09:42:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 09:42:07,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:42:07,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422059723] [2022-03-19 09:42:07,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421255102] [2022-03-19 09:42:07,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421255102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:07,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:07,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 09:42:07,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240541389] [2022-03-19 09:42:07,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240541389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:07,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:07,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 09:42:07,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536396165] [2022-03-19 09:42:07,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:07,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 09:42:07,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:07,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 09:42:07,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-19 09:42:07,863 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 09:42:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:07,968 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2022-03-19 09:42:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 09:42:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-19 09:42:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:07,970 INFO L225 Difference]: With dead ends: 76 [2022-03-19 09:42:07,970 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 09:42:07,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 09:42:07,971 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:07,972 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 197 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:42:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 09:42:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-19 09:42:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 25 states have call successors, (25), 8 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 09:42:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-03-19 09:42:07,984 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 50 [2022-03-19 09:42:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:07,984 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-03-19 09:42:07,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-19 09:42:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-03-19 09:42:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 09:42:07,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:07,985 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:08,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:08,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:08,203 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2022-03-19 09:42:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:08,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1248878348] [2022-03-19 09:42:08,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:08,205 INFO L85 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 2 times [2022-03-19 09:42:08,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:08,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694103251] [2022-03-19 09:42:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:08,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:08,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:08,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911614680] [2022-03-19 09:42:08,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:42:08,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:08,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:08,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:08,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 09:42:08,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:42:08,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 09:42:08,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 09:42:08,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:42:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 09:42:08,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:08,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694103251] [2022-03-19 09:42:08,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911614680] [2022-03-19 09:42:08,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911614680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:42:08,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:42:08,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 09:42:08,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1248878348] [2022-03-19 09:42:08,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1248878348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:08,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:08,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 09:42:08,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498440210] [2022-03-19 09:42:08,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:08,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 09:42:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 09:42:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:42:08,638 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 09:42:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:08,726 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-19 09:42:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 09:42:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-19 09:42:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:08,728 INFO L225 Difference]: With dead ends: 80 [2022-03-19 09:42:08,728 INFO L226 Difference]: Without dead ends: 78 [2022-03-19 09:42:08,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-19 09:42:08,729 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:08,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 144 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:42:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-19 09:42:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-03-19 09:42:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 09:42:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-03-19 09:42:08,745 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 56 [2022-03-19 09:42:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:08,745 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-03-19 09:42:08,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 09:42:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-03-19 09:42:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 09:42:08,747 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:08,747 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:08,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:08,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:08,960 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2022-03-19 09:42:08,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:08,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52014889] [2022-03-19 09:42:08,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 2 times [2022-03-19 09:42:08,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:08,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639532381] [2022-03-19 09:42:08,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:08,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:08,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:08,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076660215] [2022-03-19 09:42:08,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:42:08,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:08,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:08,979 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:08,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 09:42:09,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:42:09,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 09:42:09,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 09:42:09,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:42:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 09:42:09,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:09,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639532381] [2022-03-19 09:42:09,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:09,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076660215] [2022-03-19 09:42:09,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076660215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:42:09,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:42:09,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-19 09:42:09,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52014889] [2022-03-19 09:42:09,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52014889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:09,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:09,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 09:42:09,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445571679] [2022-03-19 09:42:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:09,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 09:42:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:09,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 09:42:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 09:42:09,359 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 09:42:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:09,492 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2022-03-19 09:42:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 09:42:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-19 09:42:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:09,494 INFO L225 Difference]: With dead ends: 111 [2022-03-19 09:42:09,494 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 09:42:09,494 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:42:09,494 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:09,495 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 279 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:42:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 09:42:09,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-19 09:42:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 34 states have call successors, (34), 11 states have call predecessors, (34), 10 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 09:42:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-03-19 09:42:09,513 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 63 [2022-03-19 09:42:09,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:09,513 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-03-19 09:42:09,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-19 09:42:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-03-19 09:42:09,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 09:42:09,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:09,515 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:09,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:09,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:09,731 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 1 times [2022-03-19 09:42:09,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:09,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756170776] [2022-03-19 09:42:09,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2105983492, now seen corresponding path program 2 times [2022-03-19 09:42:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:09,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023403327] [2022-03-19 09:42:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:09,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:09,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969871562] [2022-03-19 09:42:09,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 09:42:09,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:09,754 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:09,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 09:42:09,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 09:42:09,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:09,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 09:42:09,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 09:42:10,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:42:10,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023403327] [2022-03-19 09:42:10,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969871562] [2022-03-19 09:42:10,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969871562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 09:42:10,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 09:42:10,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 09:42:10,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:10,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756170776] [2022-03-19 09:42:10,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756170776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:10,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:10,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 09:42:10,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190829947] [2022-03-19 09:42:10,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:10,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 09:42:10,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:10,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 09:42:10,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-03-19 09:42:10,789 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 09:42:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:11,105 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2022-03-19 09:42:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 09:42:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-19 09:42:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:11,108 INFO L225 Difference]: With dead ends: 147 [2022-03-19 09:42:11,108 INFO L226 Difference]: Without dead ends: 144 [2022-03-19 09:42:11,108 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-03-19 09:42:11,109 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:11,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 295 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 09:42:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-19 09:42:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-19 09:42:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 72 states have internal predecessors, (78), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 09:42:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 154 transitions. [2022-03-19 09:42:11,129 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 154 transitions. Word has length 86 [2022-03-19 09:42:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:11,129 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 154 transitions. [2022-03-19 09:42:11,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 09:42:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 154 transitions. [2022-03-19 09:42:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 09:42:11,130 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:11,131 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:11,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:11,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:11,343 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 3 times [2022-03-19 09:42:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:11,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111458786] [2022-03-19 09:42:11,345 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash -895340852, now seen corresponding path program 4 times [2022-03-19 09:42:11,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:11,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922721071] [2022-03-19 09:42:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:11,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:11,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:11,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529809803] [2022-03-19 09:42:11,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:42:11,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:11,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:11,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:11,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 09:42:11,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:42:11,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:11,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 09:42:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 09:42:11,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 09:42:11,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922721071] [2022-03-19 09:42:11,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529809803] [2022-03-19 09:42:11,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529809803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:11,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:11,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:42:11,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111458786] [2022-03-19 09:42:11,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111458786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:11,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:11,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 09:42:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253957732] [2022-03-19 09:42:11,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:11,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 09:42:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 09:42:11,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 09:42:11,553 INFO L87 Difference]: Start difference. First operand 121 states and 154 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 09:42:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:11,610 INFO L93 Difference]: Finished difference Result 185 states and 240 transitions. [2022-03-19 09:42:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 09:42:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2022-03-19 09:42:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:11,613 INFO L225 Difference]: With dead ends: 185 [2022-03-19 09:42:11,613 INFO L226 Difference]: Without dead ends: 125 [2022-03-19 09:42:11,616 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-19 09:42:11,618 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:11,618 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 161 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 09:42:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-19 09:42:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-03-19 09:42:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 69 states have internal predecessors, (76), 39 states have call successors, (39), 13 states have call predecessors, (39), 12 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 09:42:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2022-03-19 09:42:11,644 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 93 [2022-03-19 09:42:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:11,646 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2022-03-19 09:42:11,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 09:42:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2022-03-19 09:42:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-19 09:42:11,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:11,648 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:11,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:11,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 09:42:11,861 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:11,862 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 3 times [2022-03-19 09:42:11,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:11,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166088235] [2022-03-19 09:42:11,863 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash -39671046, now seen corresponding path program 4 times [2022-03-19 09:42:11,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:11,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842764604] [2022-03-19 09:42:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:11,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:11,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186825275] [2022-03-19 09:42:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 09:42:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:11,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:11,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:11,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 09:42:11,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 09:42:11,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:11,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 09:42:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 53 proven. 67 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-19 09:42:13,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:42:13,880 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 09:42:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842764604] [2022-03-19 09:42:14,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186825275] [2022-03-19 09:42:14,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186825275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 09:42:14,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 09:42:14,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 09:42:14,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:14,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166088235] [2022-03-19 09:42:14,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166088235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:14,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:14,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 09:42:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084489377] [2022-03-19 09:42:14,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:14,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 09:42:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 09:42:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-03-19 09:42:14,006 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-03-19 09:42:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:14,985 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-03-19 09:42:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 09:42:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 109 [2022-03-19 09:42:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:14,988 INFO L225 Difference]: With dead ends: 164 [2022-03-19 09:42:14,988 INFO L226 Difference]: Without dead ends: 161 [2022-03-19 09:42:14,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-03-19 09:42:14,989 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 30 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:14,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 442 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 09:42:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-19 09:42:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2022-03-19 09:42:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 52 states have call successors, (52), 16 states have call predecessors, (52), 15 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-19 09:42:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2022-03-19 09:42:15,019 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 109 [2022-03-19 09:42:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:15,020 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2022-03-19 09:42:15,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-03-19 09:42:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2022-03-19 09:42:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 09:42:15,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 09:42:15,021 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 09:42:15,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:15,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 09:42:15,247 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 09:42:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 09:42:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 5 times [2022-03-19 09:42:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038096975] [2022-03-19 09:42:15,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 09:42:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash 800180238, now seen corresponding path program 6 times [2022-03-19 09:42:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 09:42:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825862684] [2022-03-19 09:42:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 09:42:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 09:42:15,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 09:42:15,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645657173] [2022-03-19 09:42:15,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 09:42:15,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 09:42:15,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 09:42:15,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 09:42:15,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 09:42:15,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 09:42:15,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 09:42:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 09:42:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 09:42:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-19 09:42:15,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 09:42:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 114 proven. 5 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-19 09:42:15,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 09:42:15,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825862684] [2022-03-19 09:42:15,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 09:42:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645657173] [2022-03-19 09:42:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645657173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 09:42:15,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 09:42:15,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 09:42:15,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 09:42:15,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038096975] [2022-03-19 09:42:15,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038096975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 09:42:15,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 09:42:15,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 09:42:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511445581] [2022-03-19 09:42:15,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 09:42:15,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 09:42:15,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 09:42:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 09:42:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-19 09:42:15,764 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 09:42:15,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 09:42:15,923 INFO L93 Difference]: Finished difference Result 164 states and 207 transitions. [2022-03-19 09:42:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 09:42:15,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 116 [2022-03-19 09:42:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 09:42:15,924 INFO L225 Difference]: With dead ends: 164 [2022-03-19 09:42:15,924 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 09:42:15,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-19 09:42:15,926 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 09:42:15,926 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 137 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 09:42:15,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 09:42:15,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 09:42:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 09:42:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 09:42:15,927 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-19 09:42:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 09:42:15,927 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 09:42:15,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-19 09:42:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 09:42:15,927 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 09:42:15,929 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 09:42:15,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 09:42:16,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 09:42:16,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 09:42:18,964 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-19 09:42:18,964 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-19 09:42:18,964 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-19 09:42:18,964 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-19 09:42:18,964 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-03-19 09:42:18,964 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 09:42:18,964 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-03-19 09:42:18,964 INFO L885 garLoopResultBuilder]: At program point L64(line 64) the Hoare annotation is: true [2022-03-19 09:42:18,964 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~y~0)) [2022-03-19 09:42:18,964 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-03-19 09:42:18,964 INFO L878 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 10)) [2022-03-19 09:42:18,964 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-19 09:42:18,964 INFO L885 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: true [2022-03-19 09:42:18,964 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 66) the Hoare annotation is: true [2022-03-19 09:42:18,964 INFO L878 garLoopResultBuilder]: At program point L50(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 66) the Hoare annotation is: true [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L40(lines 38 62) the Hoare annotation is: (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= main_~y~0 10) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= main_~b~0 (* main_~a~0 main_~y~0)))) (or (and (= main_~x~0 main_~r~0) .cse0 (= main_~q~0 0) .cse1) (and (< main_~x~0 (* main_~b~0 2)) .cse0 (= main_~x~0 (+ main_~b~0 main_~r~0)) (= main_~a~0 main_~q~0) (= main_~a~0 2) .cse2 (<= main_~y~0 main_~x~0)) (and (< main_~r~0 main_~y~0) (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) .cse0 .cse1 .cse2) (and .cse0 (= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~q~0 1) .cse1 .cse2))) [2022-03-19 09:42:18,965 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L55-1(line 55) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= (* 2 .cse0) main_~r~0) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L47-3(lines 47 59) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~r~0) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,965 INFO L878 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~y~0))) (and (<= main_~y~0 10) (= (+ (* main_~q~0 main_~y~0) main_~b~0 main_~r~0) (+ main_~x~0 .cse0)) (<= 1 main_~y~0) (= main_~b~0 .cse0))) [2022-03-19 09:42:18,966 INFO L878 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (and (= (+ (* main_~q~0 main_~y~0) main_~r~0) main_~x~0) (<= main_~y~0 10) (<= 1 main_~y~0) (= main_~b~0 (* main_~a~0 main_~y~0))) [2022-03-19 09:42:18,966 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-19 09:42:18,966 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 09:42:18,966 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-19 09:42:18,966 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-19 09:42:18,966 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 09:42:18,966 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 09:42:18,966 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-19 09:42:18,966 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 09:42:18,966 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 09:42:18,966 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-19 09:42:18,966 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 09:42:18,966 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-19 09:42:18,967 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-19 09:42:18,969 INFO L718 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2] [2022-03-19 09:42:18,970 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 09:42:18,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 09:42:18 BoogieIcfgContainer [2022-03-19 09:42:18,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 09:42:18,992 INFO L158 Benchmark]: Toolchain (without parser) took 14026.45ms. Allocated memory was 190.8MB in the beginning and 259.0MB in the end (delta: 68.2MB). Free memory was 145.3MB in the beginning and 145.0MB in the end (delta: 253.7kB). Peak memory consumption was 127.0MB. Max. memory is 8.0GB. [2022-03-19 09:42:18,992 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 190.8MB. Free memory was 161.6MB in the beginning and 161.5MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 09:42:18,992 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.36ms. Allocated memory is still 190.8MB. Free memory was 145.0MB in the beginning and 169.9MB in the end (delta: -24.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-19 09:42:18,993 INFO L158 Benchmark]: Boogie Preprocessor took 22.35ms. Allocated memory is still 190.8MB. Free memory was 169.6MB in the beginning and 168.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 09:42:18,993 INFO L158 Benchmark]: RCFGBuilder took 306.63ms. Allocated memory is still 190.8MB. Free memory was 168.3MB in the beginning and 158.1MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 09:42:18,994 INFO L158 Benchmark]: TraceAbstraction took 13482.22ms. Allocated memory was 190.8MB in the beginning and 259.0MB in the end (delta: 68.2MB). Free memory was 157.6MB in the beginning and 145.0MB in the end (delta: 12.6MB). Peak memory consumption was 139.0MB. Max. memory is 8.0GB. [2022-03-19 09:42:18,996 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 190.8MB. Free memory was 161.6MB in the beginning and 161.5MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.36ms. Allocated memory is still 190.8MB. Free memory was 145.0MB in the beginning and 169.9MB in the end (delta: -24.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.35ms. Allocated memory is still 190.8MB. Free memory was 169.6MB in the beginning and 168.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 306.63ms. Allocated memory is still 190.8MB. Free memory was 168.3MB in the beginning and 158.1MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 13482.22ms. Allocated memory was 190.8MB in the beginning and 259.0MB in the end (delta: 68.2MB). Free memory was 157.6MB in the beginning and 145.0MB in the end (delta: 12.6MB). Peak memory consumption was 139.0MB. 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 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.4s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 283 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 216 mSDsluCounter, 2207 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1754 mSDsCounter, 148 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1543 IncrementalHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 148 mSolverCounterUnsat, 453 mSDtfsCounter, 1543 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1062 GetRequests, 947 SyntacticMatches, 10 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=10, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 49 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 39 LocationsWithAnnotation, 517 PreInvPairs, 756 NumberOfFragments, 487 HoareAnnotationTreeSize, 517 FomulaSimplifications, 593 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 39 FomulaSimplificationsInter, 10229 FormulaSimplificationTreeSizeReductionInter, 2.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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: 47]: Loop Invariant Derived loop invariant: (((y <= 10 && q * y + b + r == x + a * y) && 1 <= r) && 1 <= y) && b == a * y - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((y <= 10 && q * y + b + r == x + a * y) && 1 <= y) && b == a * y - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-19 09:42:19,020 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...