/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 01:11:03,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 01:11:03,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 01:11:03,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-19 01:11:03,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-19 01:11:03,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-19 01:11:03,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-19 01:11:03,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-19 01:11:03,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-19 01:11:03,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-19 01:11:03,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-19 01:11:03,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-19 01:11:03,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 01:11:03,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 01:11:03,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 01:11:03,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 01:11:03,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 01:11:03,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 01:11:03,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 01:11:03,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 01:11:03,761 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 01:11:03,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 01:11:03,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 01:11:03,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 01:11:03,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 01:11:03,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 01:11:03,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 01:11:03,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 01:11:03,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 01:11:03,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-19 01:11:03,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 01:11:03,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 01:11:03,804 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 01:11:03,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 01:11:03,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 01:11:03,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 01:11:03,805 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 01:11:03,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 01:11:03,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 01:11:03,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 01:11:03,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 01:11:03,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 01:11:03,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 01:11:03,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 01:11:03,806 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 01:11:03,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:11:03,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 01:11:03,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 01:11:03,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-19 01:11:03,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-19 01:11:03,808 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-19 01:11:03,808 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 01:11:04,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 01:11:04,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 01:11:04,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 01:11:04,054 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 01:11:04,054 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 01:11:04,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-03-19 01:11:04,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2229cbced/d4de9d72b4344f5c8f1a96f825778ab2/FLAG2f5221309 [2022-03-19 01:11:04,485 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 01:11:04,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-03-19 01:11:04,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2229cbced/d4de9d72b4344f5c8f1a96f825778ab2/FLAG2f5221309 [2022-03-19 01:11:04,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2229cbced/d4de9d72b4344f5c8f1a96f825778ab2 [2022-03-19 01:11:04,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 01:11:04,924 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-19 01:11:04,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 01:11:04,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 01:11:04,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 01:11:04,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:11:04" (1/1) ... [2022-03-19 01:11:04,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f66057b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:04, skipping insertion in model container [2022-03-19 01:11:04,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 01:11:04" (1/1) ... [2022-03-19 01:11:04,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 01:11:04,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 01:11:05,096 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/prodbin-ll_valuebound5.c[537,550] [2022-03-19 01:11:05,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:11:05,117 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 01:11:05,126 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/prodbin-ll_valuebound5.c[537,550] [2022-03-19 01:11:05,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 01:11:05,144 INFO L208 MainTranslator]: Completed translation [2022-03-19 01:11:05,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05 WrapperNode [2022-03-19 01:11:05,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 01:11:05,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 01:11:05,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 01:11:05,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 01:11:05,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 01:11:05,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 01:11:05,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 01:11:05,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 01:11:05,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 01:11:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:05,199 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 01:11:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 01:11:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 01:11:05,236 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 01:11:05,237 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 01:11:05,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 01:11:05,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 01:11:05,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 01:11:05,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 01:11:05,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 01:11:05,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 01:11:05,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 01:11:05,204 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 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 01:11:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 01:11:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 01:11:05,285 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 01:11:05,287 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 01:11:05,375 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 01:11:05,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 01:11:05,397 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 01:11:05,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:11:05 BoogieIcfgContainer [2022-03-19 01:11:05,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 01:11:05,399 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-19 01:11:05,399 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-19 01:11:05,400 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-19 01:11:05,402 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:11:05" (1/1) ... [2022-03-19 01:11:05,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:11:05 BasicIcfg [2022-03-19 01:11:05,416 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-19 01:11:05,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 01:11:05,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 01:11:05,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 01:11:05,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 01:11:04" (1/4) ... [2022-03-19 01:11:05,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fadb7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:11:05, skipping insertion in model container [2022-03-19 01:11:05,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 01:11:05" (2/4) ... [2022-03-19 01:11:05,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fadb7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 01:11:05, skipping insertion in model container [2022-03-19 01:11:05,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 01:11:05" (3/4) ... [2022-03-19 01:11:05,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fadb7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:11:05, skipping insertion in model container [2022-03-19 01:11:05,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 19.03 01:11:05" (4/4) ... [2022-03-19 01:11:05,434 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.cqvasr [2022-03-19 01:11:05,437 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 01:11:05,437 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 01:11:05,476 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 01:11:05,483 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 01:11:05,483 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 01:11:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 01:11:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:11:05,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:05,499 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 01:11:05,500 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-03-19 01:11:05,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:05,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570370222] [2022-03-19 01:11:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:05,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 01:11:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 01:11:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:05,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 01:11:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:05,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 01:11:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:05,695 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 01:11:05,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:05,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570370222] [2022-03-19 01:11:05,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570370222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:11:05,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:11:05,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 01:11:05,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278290255] [2022-03-19 01:11:05,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:11:05,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 01:11:05,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 01:11:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 01:11:05,722 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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 01:11:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:05,782 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-19 01:11:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 01:11:05,784 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 01:11:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:05,789 INFO L225 Difference]: With dead ends: 57 [2022-03-19 01:11:05,789 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 01:11:05,792 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 01:11:05,796 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:05,797 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:11:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 01:11:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 01:11:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 01:11:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-19 01:11:05,829 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-19 01:11:05,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:05,829 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-19 01:11:05,830 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 01:11:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-19 01:11:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 01:11:05,831 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:05,832 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 01:11:05,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 01:11:05,833 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-03-19 01:11:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:05,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511202117] [2022-03-19 01:11:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:05,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:05,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016529] [2022-03-19 01:11:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:05,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:05,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:05,876 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 01:11:05,878 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 01:11:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:05,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 01:11:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:06,071 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 01:11:06,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 01:11:06,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511202117] [2022-03-19 01:11:06,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:06,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016529] [2022-03-19 01:11:06,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:11:06,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:11:06,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 01:11:06,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812328873] [2022-03-19 01:11:06,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:11:06,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 01:11:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 01:11:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 01:11:06,085 INFO L87 Difference]: Start difference. First operand 27 states and 31 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 01:11:06,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:06,153 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-03-19 01:11:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 01:11:06,154 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 01:11:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:06,155 INFO L225 Difference]: With dead ends: 39 [2022-03-19 01:11:06,155 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 01:11:06,155 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 01:11:06,156 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:06,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:11:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 01:11:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-19 01:11:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 01:11:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-19 01:11:06,161 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-19 01:11:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:06,162 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-19 01:11:06,162 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 01:11:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-19 01:11:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 01:11:06,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:06,163 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, 1] [2022-03-19 01:11:06,182 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 01:11:06,379 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 01:11:06,380 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2022-03-19 01:11:06,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:06,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347544330] [2022-03-19 01:11:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:06,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:06,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11399674] [2022-03-19 01:11:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:06,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:06,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:06,392 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 01:11:06,393 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 01:11:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:06,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 01:11:06,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:06,504 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 01:11:06,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 01:11:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:06,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347544330] [2022-03-19 01:11:06,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:06,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11399674] [2022-03-19 01:11:06,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11399674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 01:11:06,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 01:11:06,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 01:11:06,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302462949] [2022-03-19 01:11:06,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 01:11:06,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 01:11:06,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 01:11:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 01:11:06,506 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 01:11:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:06,552 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-19 01:11:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 01:11:06,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 01:11:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:06,553 INFO L225 Difference]: With dead ends: 43 [2022-03-19 01:11:06,553 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 01:11:06,553 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 01:11:06,554 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:06,554 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 01:11:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 01:11:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-19 01:11:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 01:11:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-19 01:11:06,559 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-19 01:11:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:06,559 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-19 01:11:06,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 01:11:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-19 01:11:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 01:11:06,560 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:06,560 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:11:06,593 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 01:11:06,777 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 01:11:06,777 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-03-19 01:11:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:06,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918278301] [2022-03-19 01:11:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:06,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:06,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070238975] [2022-03-19 01:11:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:06,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:06,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:06,791 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 01:11:06,794 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 01:11:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:06,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 01:11:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 01:11:07,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:11:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 01:11:15,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:15,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918278301] [2022-03-19 01:11:15,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:15,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070238975] [2022-03-19 01:11:15,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070238975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 01:11:15,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 01:11:15,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-03-19 01:11:15,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114091352] [2022-03-19 01:11:15,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 01:11:15,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 01:11:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 01:11:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-19 01:11:15,820 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 01:11:17,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 01:11:21,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 01:11:23,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 01:11:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:23,424 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-19 01:11:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 01:11:23,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2022-03-19 01:11:23,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:23,426 INFO L225 Difference]: With dead ends: 52 [2022-03-19 01:11:23,426 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 01:11:23,427 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-19 01:11:23,427 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:23,428 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 171 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-03-19 01:11:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 01:11:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-19 01:11:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 01:11:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-19 01:11:23,444 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 37 [2022-03-19 01:11:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:23,445 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-19 01:11:23,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 01:11:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-19 01:11:23,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 01:11:23,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:23,446 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:11:23,463 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 01:11:23,646 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 01:11:23,647 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:23,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2022-03-19 01:11:23,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:23,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224719715] [2022-03-19 01:11:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:23,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:23,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:23,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215098188] [2022-03-19 01:11:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:23,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:23,658 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 01:11:23,659 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 01:11:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 01:11:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 01:11:24,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:11:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 01:11:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:25,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224719715] [2022-03-19 01:11:25,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:25,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215098188] [2022-03-19 01:11:25,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215098188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 01:11:25,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 01:11:25,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-03-19 01:11:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143302382] [2022-03-19 01:11:25,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 01:11:25,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 01:11:25,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 01:11:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-19 01:11:25,891 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 01:11:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:26,657 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-03-19 01:11:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 01:11:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-03-19 01:11:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:26,658 INFO L225 Difference]: With dead ends: 66 [2022-03-19 01:11:26,658 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 01:11:26,659 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-19 01:11:26,660 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:26,660 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 179 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 01:11:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 01:11:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-19 01:11:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 01:11:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-19 01:11:26,668 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 37 [2022-03-19 01:11:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:26,668 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-19 01:11:26,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-19 01:11:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-19 01:11:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 01:11:26,669 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:26,669 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:11:26,692 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 01:11:26,870 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 01:11:26,870 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2022-03-19 01:11:26,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:26,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592576642] [2022-03-19 01:11:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:26,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:26,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510704510] [2022-03-19 01:11:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:26,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:26,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:26,881 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 01:11:26,883 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 01:11:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:26,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 01:11:26,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 01:11:27,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:11:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 01:11:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592576642] [2022-03-19 01:11:27,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:27,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510704510] [2022-03-19 01:11:27,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510704510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 01:11:27,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 01:11:27,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 01:11:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766889879] [2022-03-19 01:11:27,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 01:11:27,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 01:11:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 01:11:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 01:11:27,138 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 01:11:29,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 01:11:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:29,245 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-03-19 01:11:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 01:11:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-03-19 01:11:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:29,247 INFO L225 Difference]: With dead ends: 65 [2022-03-19 01:11:29,247 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 01:11:29,247 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-19 01:11:29,248 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:29,248 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 149 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 01:11:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 01:11:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-19 01:11:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 01:11:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-19 01:11:29,254 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 43 [2022-03-19 01:11:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:29,255 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-19 01:11:29,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 01:11:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-19 01:11:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 01:11:29,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:29,256 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:11:29,289 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 01:11:29,475 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 01:11:29,475 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1353204359, now seen corresponding path program 1 times [2022-03-19 01:11:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:29,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11367139] [2022-03-19 01:11:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:29,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454362955] [2022-03-19 01:11:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:29,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:29,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:29,490 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 01:11:29,490 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 01:11:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 01:11:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 01:11:29,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:29,822 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 01:11:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 01:11:31,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:11:32,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:32,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11367139] [2022-03-19 01:11:32,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:32,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454362955] [2022-03-19 01:11:32,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454362955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 01:11:32,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 01:11:32,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 01:11:32,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548783377] [2022-03-19 01:11:32,096 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-19 01:11:32,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 01:11:32,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:32,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 01:11:32,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-19 01:11:32,097 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 01:11:34,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 01:11:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:37,435 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-03-19 01:11:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 01:11:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-03-19 01:11:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:37,436 INFO L225 Difference]: With dead ends: 79 [2022-03-19 01:11:37,437 INFO L226 Difference]: Without dead ends: 77 [2022-03-19 01:11:37,437 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-19 01:11:37,437 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:37,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 218 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 1 Unknown, 19 Unchecked, 3.3s Time] [2022-03-19 01:11:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-19 01:11:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-03-19 01:11:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 52 states have internal predecessors, (55), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 01:11:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-03-19 01:11:37,444 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 46 [2022-03-19 01:11:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:37,445 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-03-19 01:11:37,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 01:11:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-03-19 01:11:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 01:11:37,446 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:37,446 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:11:37,462 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 01:11:37,662 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 01:11:37,662 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:37,663 INFO L85 PathProgramCache]: Analyzing trace with hash -172555565, now seen corresponding path program 2 times [2022-03-19 01:11:37,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:37,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144080450] [2022-03-19 01:11:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:37,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:37,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:37,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674317474] [2022-03-19 01:11:37,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 01:11:37,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:37,687 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 01:11:37,688 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 01:11:37,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 01:11:37,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:11:37,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 01:11:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 01:11:38,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:11:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 01:11:38,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:38,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144080450] [2022-03-19 01:11:38,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:38,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674317474] [2022-03-19 01:11:38,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674317474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 01:11:38,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 01:11:38,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-19 01:11:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729134302] [2022-03-19 01:11:38,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 01:11:38,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 01:11:38,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 01:11:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-19 01:11:38,605 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-03-19 01:11:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:11:38,787 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2022-03-19 01:11:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 01:11:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 55 [2022-03-19 01:11:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:11:38,788 INFO L225 Difference]: With dead ends: 92 [2022-03-19 01:11:38,788 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 01:11:38,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-03-19 01:11:38,789 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 01:11:38,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 191 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-03-19 01:11:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 01:11:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-19 01:11:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 49 states have internal predecessors, (49), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 01:11:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-03-19 01:11:38,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 55 [2022-03-19 01:11:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:11:38,796 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-03-19 01:11:38,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-03-19 01:11:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-03-19 01:11:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 01:11:38,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 01:11:38,797 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 01:11:38,830 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 01:11:39,027 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 01:11:39,028 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 01:11:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 01:11:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash -683089742, now seen corresponding path program 3 times [2022-03-19 01:11:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 01:11:39,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869979235] [2022-03-19 01:11:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 01:11:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 01:11:39,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 01:11:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753034323] [2022-03-19 01:11:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 01:11:39,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 01:11:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 01:11:39,037 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 01:11:39,038 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 01:11:39,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 01:11:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 01:11:39,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 01:11:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 01:11:42,600 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 01:11:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 01:11:45,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 01:11:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 01:11:46,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 01:11:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869979235] [2022-03-19 01:11:46,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 01:11:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753034323] [2022-03-19 01:11:46,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753034323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 01:11:46,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 01:11:46,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2022-03-19 01:11:46,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489007651] [2022-03-19 01:11:46,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-19 01:11:46,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-19 01:11:46,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 01:11:46,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-19 01:11:46,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=612, Unknown=1, NotChecked=0, Total=756 [2022-03-19 01:11:46,938 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-19 01:11:52,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 01:12:06,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 01:12:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 01:12:06,491 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-03-19 01:12:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 01:12:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 55 [2022-03-19 01:12:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 01:12:06,493 INFO L225 Difference]: With dead ends: 67 [2022-03-19 01:12:06,493 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 01:12:06,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=270, Invalid=1061, Unknown=1, NotChecked=0, Total=1332 [2022-03-19 01:12:06,494 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-19 01:12:06,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 226 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 212 Invalid, 1 Unknown, 15 Unchecked, 6.9s Time] [2022-03-19 01:12:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 01:12:06,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 01:12:06,495 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 01:12:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 01:12:06,495 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2022-03-19 01:12:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 01:12:06,495 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 01:12:06,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 25 states have internal predecessors, (51), 11 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-03-19 01:12:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 01:12:06,495 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 01:12:06,497 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 01:12:06,514 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 01:12:06,706 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 01:12:06,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 01:12:12,195 WARN L232 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 104 DAG size of output: 48 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 01:12:19,747 WARN L232 SmtUtils]: Spent 7.42s on a formula simplification. DAG size of input: 134 DAG size of output: 48 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-19 01:12:19,751 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 01:12:19,751 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-19 01:12:19,751 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-19 01:12:19,751 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 01:12:19,752 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 01:12:19,752 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-19 01:12:19,752 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-19 01:12:19,752 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-03-19 01:12:19,752 INFO L882 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-03-19 01:12:19,752 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-03-19 01:12:19,752 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-03-19 01:12:19,752 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-19 01:12:19,752 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-19 01:12:19,752 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-19 01:12:19,752 INFO L885 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: true [2022-03-19 01:12:19,752 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 5) (<= 0 main_~b~0)) [2022-03-19 01:12:19,752 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-03-19 01:12:19,752 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse4 (* main_~b~0 main_~a~0))) (let ((.cse1 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse4)) (.cse2 (<= main_~b~0 5)) (.cse3 (<= 1 main_~b~0)) (.cse0 (+ main_~y~0 1))) (or (and (<= 1 (mod .cse0 2)) .cse1 .cse2 .cse3 (<= 0 .cse0) (<= main_~y~0 1)) (and .cse1 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~y~0 5)) (and (<= main_~y~0 2) (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse4) .cse2 .cse3 (= (mod main_~x~0 2) 0) (< (div (* (- 1) (div (+ (* (- 1) (div (+ 2 (* (- 1) main_~b~0)) (- 2))) 1) (- 2))) (- 2)) .cse0))))) [2022-03-19 01:12:19,752 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= 1 main_~b~0))) [2022-03-19 01:12:19,753 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse4 (* main_~b~0 main_~a~0))) (let ((.cse1 (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse4)) (.cse2 (<= main_~b~0 5)) (.cse3 (<= 1 main_~b~0)) (.cse0 (+ main_~y~0 1))) (or (and (<= 1 (mod .cse0 2)) .cse1 .cse2 .cse3 (<= 0 .cse0) (<= main_~y~0 1)) (and .cse1 (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (= main_~a~0 main_~x~0) (<= main_~y~0 5)) (and (<= main_~y~0 2) (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse4) .cse2 .cse3 (= (mod main_~x~0 2) 0) (< (div (* (- 1) (div (+ (* (- 1) (div (+ 2 (* (- 1) main_~b~0)) (- 2))) 1) (- 2))) (- 2)) .cse0))))) [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-03-19 01:12:19,753 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-03-19 01:12:19,756 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-03-19 01:12:19,757 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 01:12:19,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 01:12:19 BasicIcfg [2022-03-19 01:12:19,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 01:12:19,771 INFO L158 Benchmark]: Toolchain (without parser) took 74846.50ms. Allocated memory was 232.8MB in the beginning and 280.0MB in the end (delta: 47.2MB). Free memory was 209.1MB in the beginning and 136.1MB in the end (delta: 73.0MB). Peak memory consumption was 120.6MB. Max. memory is 8.0GB. [2022-03-19 01:12:19,771 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 232.8MB. Free memory is still 196.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 01:12:19,771 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.11ms. Allocated memory is still 232.8MB. Free memory was 209.0MB in the beginning and 207.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-19 01:12:19,772 INFO L158 Benchmark]: Boogie Preprocessor took 26.84ms. Allocated memory is still 232.8MB. Free memory was 207.4MB in the beginning and 206.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 01:12:19,772 INFO L158 Benchmark]: RCFGBuilder took 223.31ms. Allocated memory is still 232.8MB. Free memory was 205.8MB in the beginning and 195.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-19 01:12:19,772 INFO L158 Benchmark]: IcfgTransformer took 17.84ms. Allocated memory is still 232.8MB. Free memory was 195.9MB in the beginning and 194.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-19 01:12:19,772 INFO L158 Benchmark]: TraceAbstraction took 74348.06ms. Allocated memory was 232.8MB in the beginning and 280.0MB in the end (delta: 47.2MB). Free memory was 194.1MB in the beginning and 136.1MB in the end (delta: 58.0MB). Peak memory consumption was 105.1MB. Max. memory is 8.0GB. [2022-03-19 01:12:19,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 232.8MB. Free memory is still 196.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.11ms. Allocated memory is still 232.8MB. Free memory was 209.0MB in the beginning and 207.4MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.84ms. Allocated memory is still 232.8MB. Free memory was 207.4MB in the beginning and 206.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 223.31ms. Allocated memory is still 232.8MB. Free memory was 205.8MB in the beginning and 195.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 17.84ms. Allocated memory is still 232.8MB. Free memory was 195.9MB in the beginning and 194.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 74348.06ms. Allocated memory was 232.8MB in the beginning and 280.0MB in the end (delta: 47.2MB). Free memory was 194.1MB in the beginning and 136.1MB in the end (delta: 58.0MB). Peak memory consumption was 105.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 74.3s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 35.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 197 SdHoareTripleChecker+Valid, 19.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 184 mSDsluCounter, 1361 SdHoareTripleChecker+Invalid, 18.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 36 IncrementalHoareTripleChecker+Unchecked, 1142 mSDsCounter, 115 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1002 IncrementalHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 115 mSolverCounterUnsat, 219 mSDtfsCounter, 1002 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 616 GetRequests, 464 SyntacticMatches, 15 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 33.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=7, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 31 PreInvPairs, 52 NumberOfFragments, 249 HoareAnnotationTreeSize, 31 FomulaSimplifications, 115 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1591 FormulaSimplificationTreeSizeReductionInter, 13.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 23.0s InterpolantComputationTime, 363 NumberOfCodeBlocks, 363 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 576 ConstructedInterpolants, 3 QuantifiedInterpolants, 2941 SizeOfPredicates, 30 NumberOfNonLiveVariables, 948 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 310/381 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((1 <= (y + 1) % 2 && z + y * x == b * a) && b <= 5) && 1 <= b) && 0 <= y + 1) && y <= 1) || ((((z + y * x == b * a && b == y) && 1 <= y) && a == x) && y <= 5)) || (((((y <= 2 && z + 2 * (-1 * x / -2 * y) == b * a) && b <= 5) && 1 <= b) && x % 2 == 0) && -1 * ((-1 * ((2 + -1 * b) / -2) + 1) / -2) / -2 < y + 1) RESULT: Ultimate proved your program to be correct! [2022-03-19 01:12:19,810 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...