/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/divbin_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:30:04,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:30:04,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:30:04,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:30:04,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:30:04,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:30:04,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:30:04,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:30:04,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:30:04,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:30:04,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:30:04,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:30:04,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:30:04,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:30:04,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:30:04,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:30:04,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:30:04,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:30:04,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:30:04,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:30:04,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:30:04,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:30:04,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:30:04,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:30:04,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:30:04,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:30:04,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:30:04,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:30:04,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:30:04,154 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:30:04,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:30:04,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:30:04,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:30:04,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:30:04,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:30:04,155 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:30:04,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:30:04,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:30:04,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:30:04,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:30:04,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:30:04,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:30:04,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:30:04,158 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:30:04,158 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:30:04,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:30:04,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:30:04,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:30:04,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:30:04,308 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:30:04,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound100.i [2022-02-23 22:30:04,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c03944/6f0a0e91c463485ab03b5c5c2fa78a77/FLAG2e3eb2b94 [2022-02-23 22:30:04,738 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:30:04,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound100.i [2022-02-23 22:30:04,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c03944/6f0a0e91c463485ab03b5c5c2fa78a77/FLAG2e3eb2b94 [2022-02-23 22:30:05,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f67c03944/6f0a0e91c463485ab03b5c5c2fa78a77 [2022-02-23 22:30:05,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:30:05,145 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:30:05,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:30:05,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:30:05,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:30:05,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e15fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05, skipping insertion in model container [2022-02-23 22:30:05,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:30:05,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:30:05,309 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/divbin_valuebound100.i[950,963] [2022-02-23 22:30:05,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:30:05,340 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:30:05,351 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/divbin_valuebound100.i[950,963] [2022-02-23 22:30:05,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:30:05,385 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:30:05,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05 WrapperNode [2022-02-23 22:30:05,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:30:05,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:30:05,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:30:05,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:30:05,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:30:05,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:30:05,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:30:05,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:30:05,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:30:05,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:30:05,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 22:30:05,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 22:30:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:30:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:30:05,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:30:05,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:30:05,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:30:05,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:30:05,528 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:30:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:30:05,529 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:30:05,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:30:05,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:30:05,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:30:05,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:30:05,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:30:05,580 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:30:05,582 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:30:05,677 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:30:05,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:30:05,681 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 22:30:05,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:30:05 BoogieIcfgContainer [2022-02-23 22:30:05,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:30:05,683 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:30:05,683 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:30:05,684 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:30:05,686 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:30:05" (1/1) ... [2022-02-23 22:30:05,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:30:05 BasicIcfg [2022-02-23 22:30:05,699 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:30:05,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:30:05,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:30:05,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:30:05,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:30:05" (1/4) ... [2022-02-23 22:30:05,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a69251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:30:05, skipping insertion in model container [2022-02-23 22:30:05,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:30:05" (2/4) ... [2022-02-23 22:30:05,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a69251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:30:05, skipping insertion in model container [2022-02-23 22:30:05,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:30:05" (3/4) ... [2022-02-23 22:30:05,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a69251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:30:05, skipping insertion in model container [2022-02-23 22:30:05,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:30:05" (4/4) ... [2022-02-23 22:30:05,705 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound100.iqvasr [2022-02-23 22:30:05,709 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:30:05,709 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:30:05,739 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:30:05,744 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:30:05,744 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:30:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 22:30:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:30:05,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:30:05,760 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:30:05,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:30:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:30:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2022-02-23 22:30:05,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:30:05,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466837912] [2022-02-23 22:30:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:30:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:05,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:30:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:05,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:30:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:05,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 22:30:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 22:30:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:05,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 22:30:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:30:05,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:30:05,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466837912] [2022-02-23 22:30:05,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466837912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:30:05,974 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:30:05,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:30:05,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456553802] [2022-02-23 22:30:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:30:05,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:30:05,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:30:06,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:30:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:30:06,009 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:30:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:30:06,102 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2022-02-23 22:30:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:30:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-02-23 22:30:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:30:06,113 INFO L225 Difference]: With dead ends: 61 [2022-02-23 22:30:06,113 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 22:30:06,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:30:06,118 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:30:06,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:30:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 22:30:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-23 22:30:06,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 22:30:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-02-23 22:30:06,145 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2022-02-23 22:30:06,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:30:06,145 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-02-23 22:30:06,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:30:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-02-23 22:30:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-23 22:30:06,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:30:06,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:30:06,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:30:06,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:30:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:30:06,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2022-02-23 22:30:06,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:30:06,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440757825] [2022-02-23 22:30:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:06,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:30:06,167 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:30:06,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404901587] [2022-02-23 22:30:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:30:06,169 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:30:06,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:30:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 22:30:06,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:30:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 22:30:06,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:30:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:30:06,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:30:06,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440757825] [2022-02-23 22:30:06,606 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:30:06,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404901587] [2022-02-23 22:30:06,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404901587] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:30:06,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:30:06,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-23 22:30:06,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619951897] [2022-02-23 22:30:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:30:06,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:30:06,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:30:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:30:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:30:06,609 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:30:08,711 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 [] [2022-02-23 22:30:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:30:08,812 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-02-23 22:30:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:30:08,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 35 [2022-02-23 22:30:08,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:30:08,813 INFO L225 Difference]: With dead ends: 41 [2022-02-23 22:30:08,813 INFO L226 Difference]: Without dead ends: 38 [2022-02-23 22:30:08,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:30:08,814 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:30:08,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 110 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-23 22:30:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-23 22:30:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-23 22:30:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:30:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-02-23 22:30:08,822 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 35 [2022-02-23 22:30:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:30:08,824 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-02-23 22:30:08,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:30:08,824 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-02-23 22:30:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 22:30:08,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:30:08,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:30:08,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 22:30:09,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:09,031 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:30:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:30:09,032 INFO L85 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2022-02-23 22:30:09,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:30:09,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217554899] [2022-02-23 22:30:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:09,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:30:09,076 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:30:09,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982023423] [2022-02-23 22:30:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:09,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:09,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:30:09,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:30:09,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:30:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 22:30:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:30:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 22:30:09,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:30:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:30:09,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:30:09,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217554899] [2022-02-23 22:30:09,703 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:30:09,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982023423] [2022-02-23 22:30:09,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982023423] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:30:09,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:30:09,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-02-23 22:30:09,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820494574] [2022-02-23 22:30:09,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:30:09,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:30:09,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:30:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:30:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:30:09,705 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:30:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:30:09,742 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-02-23 22:30:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:30:09,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-02-23 22:30:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:30:09,744 INFO L225 Difference]: With dead ends: 46 [2022-02-23 22:30:09,744 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 22:30:09,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-23 22:30:09,746 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:30:09,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 160 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-02-23 22:30:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 22:30:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-23 22:30:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 22:30:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-23 22:30:09,752 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 37 [2022-02-23 22:30:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:30:09,753 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-23 22:30:09,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 22:30:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-23 22:30:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 22:30:09,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:30:09,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:30:09,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:30:09,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:30:09,970 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:30:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:30:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2022-02-23 22:30:09,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:30:09,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108496945] [2022-02-23 22:30:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:30:09,982 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:30:09,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844290887] [2022-02-23 22:30:09,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:09,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:09,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:30:09,984 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:30:09,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:30:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 22:30:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:30:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 22:30:10,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:30:10,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:30:10,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108496945] [2022-02-23 22:30:10,090 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:30:10,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844290887] [2022-02-23 22:30:10,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844290887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:30:10,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:30:10,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:30:10,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312358670] [2022-02-23 22:30:10,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:30:10,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:30:10,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:30:10,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:30:10,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:30:10,092 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 22:30:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:30:10,112 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-02-23 22:30:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:30:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-02-23 22:30:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:30:10,115 INFO L225 Difference]: With dead ends: 55 [2022-02-23 22:30:10,115 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 22:30:10,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:30:10,116 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:30:10,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:30:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 22:30:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-23 22:30:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:30:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-02-23 22:30:10,125 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 43 [2022-02-23 22:30:10,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:30:10,125 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-02-23 22:30:10,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 22:30:10,125 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-02-23 22:30:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 22:30:10,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:30:10,126 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:30:10,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 22:30:10,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:10,327 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:30:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:30:10,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1983451131, now seen corresponding path program 1 times [2022-02-23 22:30:10,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:30:10,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230443080] [2022-02-23 22:30:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:10,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:30:10,346 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:30:10,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803951578] [2022-02-23 22:30:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:10,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:30:10,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:30:10,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:30:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:30:10,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 22:30:10,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:30:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 22:30:10,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:30:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 22:30:10,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:30:10,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230443080] [2022-02-23 22:30:10,610 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:30:10,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803951578] [2022-02-23 22:30:10,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803951578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:30:10,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:30:10,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-02-23 22:30:10,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088709066] [2022-02-23 22:30:10,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:30:10,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 22:30:10,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:30:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 22:30:10,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-23 22:30:10,612 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-23 22:30:12,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:30:14,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:30:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:30:14,845 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-02-23 22:30:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 22:30:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-02-23 22:30:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:30:14,846 INFO L225 Difference]: With dead ends: 43 [2022-02-23 22:30:14,846 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 22:30:14,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:30:14,847 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:30:14,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-02-23 22:30:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 22:30:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-23 22:30:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:30:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-02-23 22:30:14,852 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 43 [2022-02-23 22:30:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:30:14,852 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-02-23 22:30:14,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-02-23 22:30:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-02-23 22:30:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 22:30:14,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:30:14,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:30:14,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:30:15,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:15,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:30:15,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:30:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2022-02-23 22:30:15,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:30:15,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217796281] [2022-02-23 22:30:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:30:15,075 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:30:15,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785453261] [2022-02-23 22:30:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:30:15,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:30:15,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:30:15,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:30:15,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process