/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/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:04:36,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:04:36,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:04:36,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:04:36,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:04:36,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:04:36,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:04:36,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:04:36,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:04:36,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:04:36,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:04:36,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:04:36,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:04:36,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:04:36,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:04:36,563 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:04:36,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:04:36,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:04:36,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:04:36,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:04:36,570 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:04:36,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:04:36,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:04:36,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:04:36,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:04:36,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:04:36,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:04:36,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:04:36,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:04:36,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:04:36,636 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:04:36,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:04:36,639 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:04:36,639 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:04:36,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:04:36,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:04:36,640 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:04:36,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:04:36,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:04:36,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:04:36,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:04:36,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:04:36,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:04:36,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:04:36,642 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:04:36,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:04:36,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:04:36,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:04:36,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:04:36,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:04:36,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:04:36,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:04:36,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:04:36,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:04:36,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:04:36,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:04:36,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:04:36,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:04:36,645 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:04:36,645 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:04:36,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:04:36,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:04:36,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:04:36,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:04:36,914 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:04:36,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-03-20 08:04:36,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54aa6ef73/f3bb0956312944198b3444b488936ed4/FLAGb05333588 [2022-03-20 08:04:37,347 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:04:37,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-03-20 08:04:37,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54aa6ef73/f3bb0956312944198b3444b488936ed4/FLAGb05333588 [2022-03-20 08:04:37,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54aa6ef73/f3bb0956312944198b3444b488936ed4 [2022-03-20 08:04:37,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:04:37,376 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:04:37,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:04:37,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:04:37,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:04:37,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e493beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37, skipping insertion in model container [2022-03-20 08:04:37,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:04:37,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:04:37,561 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-03-20 08:04:37,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:04:37,606 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:04:37,616 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-03-20 08:04:37,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:04:37,654 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:04:37,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37 WrapperNode [2022-03-20 08:04:37,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:04:37,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:04:37,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:04:37,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:04:37,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:04:37,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:04:37,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:04:37,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:04:37,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (1/1) ... [2022-03-20 08:04:37,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:04:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:37,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:04:37,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:04:37,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:04:37,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:04:37,778 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:04:37,778 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:04:37,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:04:37,779 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:04:37,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:04:37,779 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:04:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:04:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:04:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:04:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:04:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:04:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:04:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:04:37,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:04:37,831 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:04:37,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:04:38,018 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:04:38,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:04:38,022 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-20 08:04:38,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:38 BoogieIcfgContainer [2022-03-20 08:04:38,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:04:38,025 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:04:38,025 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:04:38,025 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:04:38,028 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:38" (1/1) ... [2022-03-20 08:04:38,029 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:04:38,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:04:38 BasicIcfg [2022-03-20 08:04:38,052 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:04:38,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:04:38,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:04:38,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:04:38,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:04:37" (1/4) ... [2022-03-20 08:04:38,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431c9cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:04:38, skipping insertion in model container [2022-03-20 08:04:38,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:37" (2/4) ... [2022-03-20 08:04:38,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431c9cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:04:38, skipping insertion in model container [2022-03-20 08:04:38,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:38" (3/4) ... [2022-03-20 08:04:38,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@431c9cfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:04:38, skipping insertion in model container [2022-03-20 08:04:38,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:04:38" (4/4) ... [2022-03-20 08:04:38,058 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.iqvasr [2022-03-20 08:04:38,062 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:04:38,062 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:04:38,096 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:04:38,101 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:04:38,101 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:04:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:04:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:04:38,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:38,119 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:38,119 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1282627864, now seen corresponding path program 1 times [2022-03-20 08:04:38,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:38,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847275780] [2022-03-20 08:04:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:38,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847275780] [2022-03-20 08:04:38,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847275780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:38,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:04:38,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:04:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67816028] [2022-03-20 08:04:38,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:38,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:04:38,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:38,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:04:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:04:38,350 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:38,400 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-03-20 08:04:38,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:04:38,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 08:04:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:38,406 INFO L225 Difference]: With dead ends: 66 [2022-03-20 08:04:38,407 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:04:38,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:04:38,413 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:38,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:04:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 08:04:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-20 08:04:38,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-03-20 08:04:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:38,446 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-20 08:04:38,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-20 08:04:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:04:38,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:38,449 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:38,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:04:38,450 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:38,453 INFO L85 PathProgramCache]: Analyzing trace with hash 114426631, now seen corresponding path program 1 times [2022-03-20 08:04:38,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:38,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111302937] [2022-03-20 08:04:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:38,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:38,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111302937] [2022-03-20 08:04:38,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111302937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:38,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:04:38,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:04:38,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565471636] [2022-03-20 08:04:38,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:38,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:04:38,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:04:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:04:38,540 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:38,654 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-03-20 08:04:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:04:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 08:04:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:38,656 INFO L225 Difference]: With dead ends: 67 [2022-03-20 08:04:38,656 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 08:04:38,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:04:38,658 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:38,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:04:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 08:04:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-03-20 08:04:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-03-20 08:04:38,663 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-03-20 08:04:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:38,663 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-03-20 08:04:38,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-03-20 08:04:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 08:04:38,664 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:38,664 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:38,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:04:38,664 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:38,665 INFO L85 PathProgramCache]: Analyzing trace with hash -732347127, now seen corresponding path program 1 times [2022-03-20 08:04:38,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:38,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148535614] [2022-03-20 08:04:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:38,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148535614] [2022-03-20 08:04:38,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148535614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:38,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699762061] [2022-03-20 08:04:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:38,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:38,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:38,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:04:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:38,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:04:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:04:38,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:04:38,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699762061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:38,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:04:38,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-20 08:04:38,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546811671] [2022-03-20 08:04:38,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:39,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:04:39,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:04:39,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:04:39,001 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:39,052 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-03-20 08:04:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:04:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 08:04:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:39,056 INFO L225 Difference]: With dead ends: 55 [2022-03-20 08:04:39,056 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 08:04:39,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:04:39,059 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:39,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 154 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 08:04:39,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-03-20 08:04:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-03-20 08:04:39,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-03-20 08:04:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:39,065 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-03-20 08:04:39,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-03-20 08:04:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 08:04:39,066 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:39,066 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:39,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 08:04:39,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:39,268 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash 797221654, now seen corresponding path program 1 times [2022-03-20 08:04:39,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:39,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305217098] [2022-03-20 08:04:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:04:39,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:39,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305217098] [2022-03-20 08:04:39,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305217098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:39,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187469346] [2022-03-20 08:04:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:39,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:39,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:04:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:04:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:04:39,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:04:39,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187469346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:39,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:04:39,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-20 08:04:39,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056622914] [2022-03-20 08:04:39,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:39,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:04:39,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:04:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:04:39,515 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:39,545 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2022-03-20 08:04:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:04:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 08:04:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:39,546 INFO L225 Difference]: With dead ends: 100 [2022-03-20 08:04:39,546 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 08:04:39,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 08:04:39,547 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:39,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 08:04:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2022-03-20 08:04:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-03-20 08:04:39,558 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2022-03-20 08:04:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:39,559 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-03-20 08:04:39,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-03-20 08:04:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 08:04:39,560 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:39,560 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:39,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 08:04:39,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:04:39,778 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:39,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1389931833, now seen corresponding path program 1 times [2022-03-20 08:04:39,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:39,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278934059] [2022-03-20 08:04:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:04:39,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278934059] [2022-03-20 08:04:39,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278934059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:39,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859774085] [2022-03-20 08:04:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:39,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:39,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:39,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:04:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:39,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:04:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:40,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-20 08:04:40,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-20 08:04:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:04:40,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:04:40,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859774085] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:40,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 08:04:40,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-20 08:04:40,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129318969] [2022-03-20 08:04:40,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:40,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:04:40,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:40,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:04:40,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:04:40,212 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:40,280 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-03-20 08:04:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:04:40,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 08:04:40,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:40,281 INFO L225 Difference]: With dead ends: 67 [2022-03-20 08:04:40,281 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 08:04:40,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 08:04:40,282 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:40,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 08:04:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 08:04:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-03-20 08:04:40,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2022-03-20 08:04:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:40,287 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-03-20 08:04:40,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-03-20 08:04:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 08:04:40,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:40,288 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:40,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:40,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:40,506 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:40,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:40,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1280910829, now seen corresponding path program 1 times [2022-03-20 08:04:40,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:40,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998766618] [2022-03-20 08:04:40,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:40,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:04:40,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:40,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998766618] [2022-03-20 08:04:40,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998766618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:40,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160197856] [2022-03-20 08:04:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:40,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:40,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:40,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:04:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:04:40,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:40,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-20 08:04:40,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 08:04:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:04:40,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 08:04:40,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160197856] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:40,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 08:04:40,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-20 08:04:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786859866] [2022-03-20 08:04:40,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:40,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:04:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:04:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:04:40,867 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:40,956 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-03-20 08:04:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:04:40,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 08:04:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:40,958 INFO L225 Difference]: With dead ends: 72 [2022-03-20 08:04:40,958 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 08:04:40,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-20 08:04:40,959 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:40,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 94 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 08:04:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-03-20 08:04:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-20 08:04:40,967 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2022-03-20 08:04:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:40,967 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-20 08:04:40,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-20 08:04:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 08:04:40,968 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:40,968 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:41,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:41,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:41,187 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1387529366, now seen corresponding path program 1 times [2022-03-20 08:04:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591721444] [2022-03-20 08:04:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:41,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 08:04:41,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:41,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591721444] [2022-03-20 08:04:41,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591721444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:41,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506231839] [2022-03-20 08:04:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:41,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:41,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:41,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:41,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:04:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:41,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 08:04:41,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 08:04:41,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 08:04:41,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506231839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:41,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:41,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2022-03-20 08:04:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583294873] [2022-03-20 08:04:41,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:41,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 08:04:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 08:04:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:04:41,436 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:41,760 INFO L93 Difference]: Finished difference Result 211 states and 285 transitions. [2022-03-20 08:04:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 08:04:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 08:04:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:41,761 INFO L225 Difference]: With dead ends: 211 [2022-03-20 08:04:41,761 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 08:04:41,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:04:41,762 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 288 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:41,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 70 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:04:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 08:04:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 53. [2022-03-20 08:04:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-03-20 08:04:41,770 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 31 [2022-03-20 08:04:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:41,770 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-03-20 08:04:41,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-03-20 08:04:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 08:04:41,771 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:41,771 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:41,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:41,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:41,989 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:41,990 INFO L85 PathProgramCache]: Analyzing trace with hash -830957429, now seen corresponding path program 2 times [2022-03-20 08:04:41,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:41,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143292206] [2022-03-20 08:04:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:41,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:42,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 08:04:42,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:42,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143292206] [2022-03-20 08:04:42,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143292206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:42,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308158502] [2022-03-20 08:04:42,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:04:42,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:42,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:42,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:42,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:04:42,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:04:42,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:04:42,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 08:04:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:42,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 08:04:42,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 08:04:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:04:42,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 08:04:42,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308158502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:42,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:42,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 9] total 22 [2022-03-20 08:04:42,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338461411] [2022-03-20 08:04:42,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:42,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 08:04:42,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:42,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 08:04:42,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:04:42,531 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:43,153 INFO L93 Difference]: Finished difference Result 230 states and 312 transitions. [2022-03-20 08:04:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 08:04:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 08:04:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:43,155 INFO L225 Difference]: With dead ends: 230 [2022-03-20 08:04:43,155 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 08:04:43,156 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 08:04:43,156 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 527 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:43,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 105 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 08:04:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 08:04:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 78. [2022-03-20 08:04:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 73 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-03-20 08:04:43,169 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 35 [2022-03-20 08:04:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:43,169 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-03-20 08:04:43,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 21 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-03-20 08:04:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 08:04:43,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:43,170 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:43,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 08:04:43,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:43,383 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:43,384 INFO L85 PathProgramCache]: Analyzing trace with hash 398344247, now seen corresponding path program 1 times [2022-03-20 08:04:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:43,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494596130] [2022-03-20 08:04:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:43,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 08:04:43,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:43,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494596130] [2022-03-20 08:04:43,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494596130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:43,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096329050] [2022-03-20 08:04:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:43,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:43,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:43,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:43,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:04:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:04:43,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 08:04:43,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:04:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096329050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:43,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:04:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-03-20 08:04:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379754473] [2022-03-20 08:04:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:43,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:04:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:04:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:04:43,628 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:43,650 INFO L93 Difference]: Finished difference Result 145 states and 194 transitions. [2022-03-20 08:04:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:04:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 08:04:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:43,650 INFO L225 Difference]: With dead ends: 145 [2022-03-20 08:04:43,651 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 08:04:43,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:04:43,663 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:43,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 08:04:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2022-03-20 08:04:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2022-03-20 08:04:43,693 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 38 [2022-03-20 08:04:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:43,694 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2022-03-20 08:04:43,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2022-03-20 08:04:43,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 08:04:43,697 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:43,697 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:43,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:43,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:43,913 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1770900345, now seen corresponding path program 1 times [2022-03-20 08:04:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:43,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913928161] [2022-03-20 08:04:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:43,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 08:04:43,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913928161] [2022-03-20 08:04:43,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913928161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:43,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194031427] [2022-03-20 08:04:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:43,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:43,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:43,988 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:44,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:04:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:44,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 08:04:44,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 08:04:44,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 08:04:44,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194031427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:44,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:44,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 17 [2022-03-20 08:04:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135169049] [2022-03-20 08:04:44,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:44,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 08:04:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 08:04:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-20 08:04:44,294 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:45,368 INFO L93 Difference]: Finished difference Result 486 states and 650 transitions. [2022-03-20 08:04:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 08:04:45,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-20 08:04:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:45,369 INFO L225 Difference]: With dead ends: 486 [2022-03-20 08:04:45,370 INFO L226 Difference]: Without dead ends: 408 [2022-03-20 08:04:45,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1891, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 08:04:45,371 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 686 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:45,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 170 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 08:04:45,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-03-20 08:04:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 116. [2022-03-20 08:04:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 111 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2022-03-20 08:04:45,404 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 41 [2022-03-20 08:04:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:45,404 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2022-03-20 08:04:45,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2022-03-20 08:04:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 08:04:45,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:45,405 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-03-20 08:04:45,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:45,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 08:04:45,606 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:45,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1579634730, now seen corresponding path program 1 times [2022-03-20 08:04:45,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:45,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877421823] [2022-03-20 08:04:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:45,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:45,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 08:04:45,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:45,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877421823] [2022-03-20 08:04:45,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877421823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:45,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840992485] [2022-03-20 08:04:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:45,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:45,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:45,695 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:45,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:04:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 08:04:45,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:45,991 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:04:45,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:04:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 08:04:46,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:46,161 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-03-20 08:04:46,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-03-20 08:04:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 08:04:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840992485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:46,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:46,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2022-03-20 08:04:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254903717] [2022-03-20 08:04:46,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:46,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 08:04:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 08:04:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-20 08:04:46,292 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:47,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:47,546 INFO L93 Difference]: Finished difference Result 648 states and 874 transitions. [2022-03-20 08:04:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 08:04:47,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 08:04:47,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:47,549 INFO L225 Difference]: With dead ends: 648 [2022-03-20 08:04:47,549 INFO L226 Difference]: Without dead ends: 547 [2022-03-20 08:04:47,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 08:04:47,551 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 583 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:47,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 148 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 08:04:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-03-20 08:04:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 164. [2022-03-20 08:04:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2022-03-20 08:04:47,583 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 43 [2022-03-20 08:04:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:47,583 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2022-03-20 08:04:47,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2022-03-20 08:04:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 08:04:47,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:47,584 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:47,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:47,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:47,809 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash -995410890, now seen corresponding path program 1 times [2022-03-20 08:04:47,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495952607] [2022-03-20 08:04:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:47,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 08:04:47,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:47,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495952607] [2022-03-20 08:04:47,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495952607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:47,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035004108] [2022-03-20 08:04:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:47,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:47,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:47,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:47,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:04:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:48,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 08:04:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:48,254 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 08:04:48,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-20 08:04:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:04:48,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:48,423 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-20 08:04:48,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-20 08:04:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:04:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035004108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:48,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 9] total 19 [2022-03-20 08:04:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496585052] [2022-03-20 08:04:48,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:48,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 08:04:48,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:48,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 08:04:48,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-20 08:04:48,523 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:49,111 INFO L93 Difference]: Finished difference Result 461 states and 627 transitions. [2022-03-20 08:04:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 08:04:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-20 08:04:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:49,113 INFO L225 Difference]: With dead ends: 461 [2022-03-20 08:04:49,114 INFO L226 Difference]: Without dead ends: 358 [2022-03-20 08:04:49,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 08:04:49,116 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 246 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:49,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 87 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:04:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-20 08:04:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 218. [2022-03-20 08:04:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.2535211267605635) internal successors, (267), 213 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 271 transitions. [2022-03-20 08:04:49,154 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 271 transitions. Word has length 45 [2022-03-20 08:04:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:49,154 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 271 transitions. [2022-03-20 08:04:49,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 271 transitions. [2022-03-20 08:04:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 08:04:49,156 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:49,156 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:49,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:49,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 08:04:49,375 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:49,376 INFO L85 PathProgramCache]: Analyzing trace with hash -115243393, now seen corresponding path program 2 times [2022-03-20 08:04:49,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:49,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726788218] [2022-03-20 08:04:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:49,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:49,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:49,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:04:49,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726788218] [2022-03-20 08:04:49,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726788218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:49,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524329243] [2022-03-20 08:04:49,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:04:49,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:49,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:49,596 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:49,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:04:49,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:04:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:04:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 08:04:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 08:04:49,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:04:50,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524329243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:50,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:50,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-03-20 08:04:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106345499] [2022-03-20 08:04:50,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:50,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 08:04:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 08:04:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-20 08:04:50,151 INFO L87 Difference]: Start difference. First operand 218 states and 271 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:51,716 INFO L93 Difference]: Finished difference Result 656 states and 861 transitions. [2022-03-20 08:04:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 08:04:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 08:04:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:51,721 INFO L225 Difference]: With dead ends: 656 [2022-03-20 08:04:51,721 INFO L226 Difference]: Without dead ends: 650 [2022-03-20 08:04:51,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=2519, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 08:04:51,724 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 613 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:51,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 178 Invalid, 2234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 08:04:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-20 08:04:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 284. [2022-03-20 08:04:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2580645161290323) internal successors, (351), 279 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:51,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2022-03-20 08:04:51,784 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 51 [2022-03-20 08:04:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:51,784 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2022-03-20 08:04:51,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:51,785 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2022-03-20 08:04:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 08:04:51,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:51,786 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:51,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:52,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 08:04:52,024 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash -311756898, now seen corresponding path program 1 times [2022-03-20 08:04:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:52,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668060654] [2022-03-20 08:04:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:52,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:04:52,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:52,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668060654] [2022-03-20 08:04:52,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668060654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:52,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957972458] [2022-03-20 08:04:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:52,396 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:52,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:04:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 08:04:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:52,863 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:04:52,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:04:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 08:04:52,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:04:55,910 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-03-20 08:04:55,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-03-20 08:04:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:04:56,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957972458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:04:56,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:04:56,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 30 [2022-03-20 08:04:56,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490226004] [2022-03-20 08:04:56,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:04:56,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 08:04:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 08:04:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=751, Unknown=4, NotChecked=0, Total=870 [2022-03-20 08:04:56,028 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:57,903 INFO L93 Difference]: Finished difference Result 736 states and 958 transitions. [2022-03-20 08:04:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 08:04:57,904 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 08:04:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:57,906 INFO L225 Difference]: With dead ends: 736 [2022-03-20 08:04:57,906 INFO L226 Difference]: Without dead ends: 544 [2022-03-20 08:04:57,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=518, Invalid=2670, Unknown=4, NotChecked=0, Total=3192 [2022-03-20 08:04:57,908 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 253 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:57,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 114 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1125 Invalid, 0 Unknown, 167 Unchecked, 0.6s Time] [2022-03-20 08:04:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-03-20 08:04:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 388. [2022-03-20 08:04:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.2349869451697129) internal successors, (473), 383 states have internal predecessors, (473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 477 transitions. [2022-03-20 08:04:57,986 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 477 transitions. Word has length 51 [2022-03-20 08:04:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:57,987 INFO L478 AbstractCegarLoop]: Abstraction has 388 states and 477 transitions. [2022-03-20 08:04:57,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 29 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 477 transitions. [2022-03-20 08:04:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 08:04:57,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:57,988 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:58,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 08:04:58,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 08:04:58,208 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2141667614, now seen corresponding path program 1 times [2022-03-20 08:04:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:58,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089213622] [2022-03-20 08:04:58,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:58,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:58,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:04:58,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:58,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089213622] [2022-03-20 08:04:58,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089213622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:04:58,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067419022] [2022-03-20 08:04:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:58,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:04:58,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:58,531 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:04:58,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 08:04:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 08:04:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:04:58,973 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:04:58,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 08:04:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 08:04:58,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:02,055 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-20 08:05:02,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-20 08:05:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:05:02,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067419022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:02,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:02,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 29 [2022-03-20 08:05:02,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171691445] [2022-03-20 08:05:02,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:02,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 08:05:02,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 08:05:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=692, Unknown=4, NotChecked=0, Total=812 [2022-03-20 08:05:02,165 INFO L87 Difference]: Start difference. First operand 388 states and 477 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:03,663 INFO L93 Difference]: Finished difference Result 584 states and 748 transitions. [2022-03-20 08:05:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 08:05:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 08:05:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:03,666 INFO L225 Difference]: With dead ends: 584 [2022-03-20 08:05:03,666 INFO L226 Difference]: Without dead ends: 550 [2022-03-20 08:05:03,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=714, Invalid=3064, Unknown=4, NotChecked=0, Total=3782 [2022-03-20 08:05:03,667 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 175 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:03,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 88 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 592 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2022-03-20 08:05:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-20 08:05:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 432. [2022-03-20 08:05:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.224824355971897) internal successors, (523), 427 states have internal predecessors, (523), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 527 transitions. [2022-03-20 08:05:03,733 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 527 transitions. Word has length 51 [2022-03-20 08:05:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:03,733 INFO L478 AbstractCegarLoop]: Abstraction has 432 states and 527 transitions. [2022-03-20 08:05:03,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 527 transitions. [2022-03-20 08:05:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 08:05:03,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:03,734 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:03,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:03,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 08:05:03,947 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash -228944736, now seen corresponding path program 1 times [2022-03-20 08:05:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820577011] [2022-03-20 08:05:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:03,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:04,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:04,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:05:04,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:04,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820577011] [2022-03-20 08:05:04,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820577011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:04,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412884978] [2022-03-20 08:05:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:04,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:04,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:04,528 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:04,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 08:05:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 08:05:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:04,945 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:05:04,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-20 08:05:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 08:05:04,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:05,119 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-03-20 08:05:05,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 75 [2022-03-20 08:05:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:05:05,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412884978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:05,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:05,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 31 [2022-03-20 08:05:05,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806896045] [2022-03-20 08:05:05,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:05,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 08:05:05,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:05,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 08:05:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-03-20 08:05:05,253 INFO L87 Difference]: Start difference. First operand 432 states and 527 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:06,724 INFO L93 Difference]: Finished difference Result 738 states and 931 transitions. [2022-03-20 08:05:06,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 08:05:06,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 08:05:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:06,726 INFO L225 Difference]: With dead ends: 738 [2022-03-20 08:05:06,726 INFO L226 Difference]: Without dead ends: 682 [2022-03-20 08:05:06,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=805, Invalid=2977, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 08:05:06,728 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 356 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:06,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 85 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 08:05:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-03-20 08:05:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 437. [2022-03-20 08:05:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 432 states have (on average 1.2291666666666667) internal successors, (531), 432 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 535 transitions. [2022-03-20 08:05:06,821 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 535 transitions. Word has length 51 [2022-03-20 08:05:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:06,821 INFO L478 AbstractCegarLoop]: Abstraction has 437 states and 535 transitions. [2022-03-20 08:05:06,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 535 transitions. [2022-03-20 08:05:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 08:05:06,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:06,825 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:06,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 08:05:07,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:07,050 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:07,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -316045411, now seen corresponding path program 1 times [2022-03-20 08:05:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:07,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7558719] [2022-03-20 08:05:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:07,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:07,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-20 08:05:07,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7558719] [2022-03-20 08:05:07,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7558719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656533213] [2022-03-20 08:05:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:07,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:07,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:07,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:07,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 08:05:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:07,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 08:05:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 08:05:07,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 08:05:07,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656533213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:07,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:07,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 10] total 19 [2022-03-20 08:05:07,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908291863] [2022-03-20 08:05:07,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:07,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 08:05:07,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 08:05:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-20 08:05:07,536 INFO L87 Difference]: Start difference. First operand 437 states and 535 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:12,199 INFO L93 Difference]: Finished difference Result 2985 states and 3809 transitions. [2022-03-20 08:05:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-20 08:05:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-20 08:05:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:12,209 INFO L225 Difference]: With dead ends: 2985 [2022-03-20 08:05:12,209 INFO L226 Difference]: Without dead ends: 2833 [2022-03-20 08:05:12,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7899 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2674, Invalid=17348, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 08:05:12,215 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 1805 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:12,215 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1805 Valid, 110 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 08:05:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2022-03-20 08:05:12,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 500. [2022-03-20 08:05:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 495 states have (on average 1.2444444444444445) internal successors, (616), 495 states have internal predecessors, (616), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 620 transitions. [2022-03-20 08:05:12,363 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 620 transitions. Word has length 54 [2022-03-20 08:05:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:12,363 INFO L478 AbstractCegarLoop]: Abstraction has 500 states and 620 transitions. [2022-03-20 08:05:12,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 620 transitions. [2022-03-20 08:05:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 08:05:12,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:12,364 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:12,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:12,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 08:05:12,583 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash -90443586, now seen corresponding path program 1 times [2022-03-20 08:05:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599750883] [2022-03-20 08:05:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:12,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 08:05:12,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599750883] [2022-03-20 08:05:12,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599750883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137130157] [2022-03-20 08:05:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:12,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:12,636 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:12,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 08:05:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:12,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 08:05:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 08:05:12,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 08:05:12,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137130157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:12,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:12,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2022-03-20 08:05:12,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424380659] [2022-03-20 08:05:12,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:12,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 08:05:12,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 08:05:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:05:12,888 INFO L87 Difference]: Start difference. First operand 500 states and 620 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:13,248 INFO L93 Difference]: Finished difference Result 877 states and 1083 transitions. [2022-03-20 08:05:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 08:05:13,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-20 08:05:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:13,250 INFO L225 Difference]: With dead ends: 877 [2022-03-20 08:05:13,250 INFO L226 Difference]: Without dead ends: 470 [2022-03-20 08:05:13,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-20 08:05:13,252 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 194 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:13,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 75 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:05:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-20 08:05:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 343. [2022-03-20 08:05:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.168639053254438) internal successors, (395), 338 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 399 transitions. [2022-03-20 08:05:13,352 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 399 transitions. Word has length 57 [2022-03-20 08:05:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:13,352 INFO L478 AbstractCegarLoop]: Abstraction has 343 states and 399 transitions. [2022-03-20 08:05:13,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 11 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 399 transitions. [2022-03-20 08:05:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 08:05:13,353 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:13,353 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:13,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:13,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 08:05:13,558 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:13,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:13,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1290898950, now seen corresponding path program 2 times [2022-03-20 08:05:13,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:13,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100507686] [2022-03-20 08:05:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:05:13,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:13,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100507686] [2022-03-20 08:05:13,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100507686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:13,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69238500] [2022-03-20 08:05:13,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:05:13,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:13,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:13,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:13,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 08:05:13,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:05:13,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 08:05:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:14,532 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:05:14,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-03-20 08:05:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:05:14,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:14,979 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-20 08:05:14,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 37 [2022-03-20 08:05:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-20 08:05:15,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69238500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:15,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:15,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 16] total 43 [2022-03-20 08:05:15,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494617675] [2022-03-20 08:05:15,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:15,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 08:05:15,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 08:05:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 08:05:15,073 INFO L87 Difference]: Start difference. First operand 343 states and 399 transitions. Second operand has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 42 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:16,367 INFO L93 Difference]: Finished difference Result 455 states and 520 transitions. [2022-03-20 08:05:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 08:05:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 42 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-20 08:05:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:16,369 INFO L225 Difference]: With dead ends: 455 [2022-03-20 08:05:16,369 INFO L226 Difference]: Without dead ends: 371 [2022-03-20 08:05:16,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=742, Invalid=3548, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 08:05:16,370 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 447 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:16,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 125 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 981 Invalid, 0 Unknown, 246 Unchecked, 0.4s Time] [2022-03-20 08:05:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-20 08:05:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 321. [2022-03-20 08:05:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 316 states have (on average 1.1708860759493671) internal successors, (370), 316 states have internal predecessors, (370), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 374 transitions. [2022-03-20 08:05:16,468 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 374 transitions. Word has length 61 [2022-03-20 08:05:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:16,468 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 374 transitions. [2022-03-20 08:05:16,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 42 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 374 transitions. [2022-03-20 08:05:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 08:05:16,469 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:16,469 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:16,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:16,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:16,678 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:16,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1745771759, now seen corresponding path program 2 times [2022-03-20 08:05:16,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:16,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681598232] [2022-03-20 08:05:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:16,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:16,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-20 08:05:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:16,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681598232] [2022-03-20 08:05:16,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681598232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:16,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207131331] [2022-03-20 08:05:16,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:05:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:16,808 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:16,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 08:05:16,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:05:16,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:16,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 08:05:16,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:17,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-20 08:05:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 08:05:17,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:17,312 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-20 08:05:17,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-20 08:05:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 08:05:17,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207131331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:17,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:17,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2022-03-20 08:05:17,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205853159] [2022-03-20 08:05:17,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:17,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 08:05:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 08:05:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-03-20 08:05:17,371 INFO L87 Difference]: Start difference. First operand 321 states and 374 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 30 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:20,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:20,472 INFO L93 Difference]: Finished difference Result 3028 states and 3554 transitions. [2022-03-20 08:05:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 08:05:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 30 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 08:05:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:20,481 INFO L225 Difference]: With dead ends: 3028 [2022-03-20 08:05:20,481 INFO L226 Difference]: Without dead ends: 2927 [2022-03-20 08:05:20,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=4236, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 08:05:20,483 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 1409 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4814 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 5018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 4814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:20,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 253 Invalid, 5018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 4814 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 08:05:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2022-03-20 08:05:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 615. [2022-03-20 08:05:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 610 states have (on average 1.1655737704918032) internal successors, (711), 610 states have internal predecessors, (711), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 715 transitions. [2022-03-20 08:05:20,660 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 715 transitions. Word has length 62 [2022-03-20 08:05:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:20,660 INFO L478 AbstractCegarLoop]: Abstraction has 615 states and 715 transitions. [2022-03-20 08:05:20,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 30 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 715 transitions. [2022-03-20 08:05:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 08:05:20,661 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:20,661 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:20,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:20,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:20,875 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash 680057758, now seen corresponding path program 3 times [2022-03-20 08:05:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:20,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763688232] [2022-03-20 08:05:20,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:20,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:21,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 08:05:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:21,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763688232] [2022-03-20 08:05:21,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763688232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:21,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289040663] [2022-03-20 08:05:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:05:21,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:21,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:21,362 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:21,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 08:05:21,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-20 08:05:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 08:05:21,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:21,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:05:21,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 08:05:21,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:05:21,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:05:22,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 08:05:22,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:05:22,011 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:05:22,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-03-20 08:05:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 58 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-20 08:05:22,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 08:05:30,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289040663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:30,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:30,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 12] total 38 [2022-03-20 08:05:30,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230348370] [2022-03-20 08:05:30,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:30,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 08:05:30,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 08:05:30,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1186, Unknown=12, NotChecked=0, Total=1406 [2022-03-20 08:05:30,007 INFO L87 Difference]: Start difference. First operand 615 states and 715 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 37 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:31,430 INFO L93 Difference]: Finished difference Result 1273 states and 1473 transitions. [2022-03-20 08:05:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 08:05:31,431 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 37 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 08:05:31,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:31,433 INFO L225 Difference]: With dead ends: 1273 [2022-03-20 08:05:31,433 INFO L226 Difference]: Without dead ends: 1195 [2022-03-20 08:05:31,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=613, Invalid=3665, Unknown=12, NotChecked=0, Total=4290 [2022-03-20 08:05:31,434 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 298 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:31,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 127 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1443 Invalid, 0 Unknown, 315 Unchecked, 0.6s Time] [2022-03-20 08:05:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-03-20 08:05:31,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 921. [2022-03-20 08:05:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 916 states have (on average 1.165938864628821) internal successors, (1068), 916 states have internal predecessors, (1068), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1072 transitions. [2022-03-20 08:05:31,672 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1072 transitions. Word has length 72 [2022-03-20 08:05:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:31,672 INFO L478 AbstractCegarLoop]: Abstraction has 921 states and 1072 transitions. [2022-03-20 08:05:31,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 37 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1072 transitions. [2022-03-20 08:05:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 08:05:31,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:31,674 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:31,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:31,904 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:31,904 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash 120675200, now seen corresponding path program 4 times [2022-03-20 08:05:31,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:31,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431773680] [2022-03-20 08:05:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:31,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 08:05:32,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:32,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431773680] [2022-03-20 08:05:32,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431773680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:32,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30535275] [2022-03-20 08:05:32,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:05:32,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:32,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:32,558 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:32,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 08:05:32,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:05:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 08:05:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:33,165 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:05:33,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:05:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 59 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 08:05:33,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:33,407 INFO L356 Elim1Store]: treesize reduction 35, result has 63.9 percent of original size [2022-03-20 08:05:33,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-03-20 08:05:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 08:05:33,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30535275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:33,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:33,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 13] total 39 [2022-03-20 08:05:33,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838990281] [2022-03-20 08:05:33,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:33,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 08:05:33,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 08:05:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 08:05:33,572 INFO L87 Difference]: Start difference. First operand 921 states and 1072 transitions. Second operand has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 38 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:36,403 INFO L93 Difference]: Finished difference Result 2108 states and 2443 transitions. [2022-03-20 08:05:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 08:05:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 38 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 08:05:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:36,410 INFO L225 Difference]: With dead ends: 2108 [2022-03-20 08:05:36,410 INFO L226 Difference]: Without dead ends: 1790 [2022-03-20 08:05:36,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1236, Invalid=7506, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 08:05:36,412 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 457 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 2292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:36,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 102 Invalid, 2292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 08:05:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-03-20 08:05:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1278. [2022-03-20 08:05:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1273 states have (on average 1.171249018067557) internal successors, (1491), 1273 states have internal predecessors, (1491), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1495 transitions. [2022-03-20 08:05:36,771 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1495 transitions. Word has length 72 [2022-03-20 08:05:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:36,771 INFO L478 AbstractCegarLoop]: Abstraction has 1278 states and 1495 transitions. [2022-03-20 08:05:36,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 38 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1495 transitions. [2022-03-20 08:05:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 08:05:36,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:36,774 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:36,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:36,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 08:05:36,991 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:36,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1596025634, now seen corresponding path program 5 times [2022-03-20 08:05:36,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:36,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694407507] [2022-03-20 08:05:36,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:36,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:37,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 08:05:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694407507] [2022-03-20 08:05:37,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694407507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779090838] [2022-03-20 08:05:37,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:05:37,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:37,537 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:37,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 08:05:37,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-20 08:05:37,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 08:05:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:38,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:05:38,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 08:05:38,829 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:05:38,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 08:05:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 62 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 08:05:38,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-03-20 08:05:43,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779090838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:43,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:43,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 18] total 46 [2022-03-20 08:05:43,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084048399] [2022-03-20 08:05:43,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:43,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 08:05:43,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 08:05:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1723, Unknown=3, NotChecked=0, Total=2070 [2022-03-20 08:05:43,555 INFO L87 Difference]: Start difference. First operand 1278 states and 1495 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:47,285 INFO L93 Difference]: Finished difference Result 2173 states and 2536 transitions. [2022-03-20 08:05:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 08:05:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 08:05:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:47,295 INFO L225 Difference]: With dead ends: 2173 [2022-03-20 08:05:47,296 INFO L226 Difference]: Without dead ends: 2134 [2022-03-20 08:05:47,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 154 SyntacticMatches, 10 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1749, Invalid=10238, Unknown=3, NotChecked=0, Total=11990 [2022-03-20 08:05:47,298 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 541 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1117 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:47,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 199 Invalid, 3620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2388 Invalid, 0 Unknown, 1117 Unchecked, 1.0s Time] [2022-03-20 08:05:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2022-03-20 08:05:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1389. [2022-03-20 08:05:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1384 states have (on average 1.1589595375722543) internal successors, (1604), 1384 states have internal predecessors, (1604), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1608 transitions. [2022-03-20 08:05:47,861 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1608 transitions. Word has length 72 [2022-03-20 08:05:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:47,861 INFO L478 AbstractCegarLoop]: Abstraction has 1389 states and 1608 transitions. [2022-03-20 08:05:47,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:47,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1608 transitions. [2022-03-20 08:05:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 08:05:47,864 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:47,864 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:47,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:48,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 08:05:48,079 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1692915136, now seen corresponding path program 6 times [2022-03-20 08:05:48,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:48,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415931248] [2022-03-20 08:05:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 08:05:48,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:48,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415931248] [2022-03-20 08:05:48,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415931248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250401652] [2022-03-20 08:05:48,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 08:05:48,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:48,746 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:48,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 08:05:48,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 08:05:48,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 08:05:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:48,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:05:49,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 08:05:49,480 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-20 08:05:49,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 18 [2022-03-20 08:05:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 08:05:49,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 08:05:49,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250401652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:49,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:49,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 36 [2022-03-20 08:05:49,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133245677] [2022-03-20 08:05:49,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:49,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 08:05:49,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 08:05:49,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 08:05:49,954 INFO L87 Difference]: Start difference. First operand 1389 states and 1608 transitions. Second operand has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:51,327 INFO L93 Difference]: Finished difference Result 1766 states and 2024 transitions. [2022-03-20 08:05:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 08:05:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 08:05:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:51,331 INFO L225 Difference]: With dead ends: 1766 [2022-03-20 08:05:51,331 INFO L226 Difference]: Without dead ends: 1560 [2022-03-20 08:05:51,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=2043, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 08:05:51,334 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 214 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:51,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 109 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 973 Invalid, 0 Unknown, 290 Unchecked, 0.4s Time] [2022-03-20 08:05:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-03-20 08:05:51,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1422. [2022-03-20 08:05:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1417 states have (on average 1.1496118560338744) internal successors, (1629), 1417 states have internal predecessors, (1629), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1633 transitions. [2022-03-20 08:05:51,891 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1633 transitions. Word has length 72 [2022-03-20 08:05:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:51,891 INFO L478 AbstractCegarLoop]: Abstraction has 1422 states and 1633 transitions. [2022-03-20 08:05:51,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.2777777777777777) internal successors, (118), 35 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1633 transitions. [2022-03-20 08:05:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 08:05:51,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:51,894 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:51,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 08:05:52,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:52,103 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:52,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash 844603479, now seen corresponding path program 3 times [2022-03-20 08:05:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555675626] [2022-03-20 08:05:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:52,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 08:05:52,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:52,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555675626] [2022-03-20 08:05:52,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555675626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:52,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893807036] [2022-03-20 08:05:52,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:05:52,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:52,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:52,226 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:52,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 08:05:52,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 08:05:52,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:05:52,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 08:05:52,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:52,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 08:05:52,512 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:05:52,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-03-20 08:05:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-20 08:05:52,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:05:52,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893807036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:05:52,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:05:52,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-03-20 08:05:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714629710] [2022-03-20 08:05:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:05:52,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 08:05:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 08:05:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-03-20 08:05:52,558 INFO L87 Difference]: Start difference. First operand 1422 states and 1633 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:53,020 INFO L93 Difference]: Finished difference Result 1468 states and 1685 transitions. [2022-03-20 08:05:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:05:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-20 08:05:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:53,023 INFO L225 Difference]: With dead ends: 1468 [2022-03-20 08:05:53,023 INFO L226 Difference]: Without dead ends: 1401 [2022-03-20 08:05:53,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-03-20 08:05:53,024 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:53,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-03-20 08:05:53,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-03-20 08:05:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1401. [2022-03-20 08:05:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1396 states have (on average 1.1482808022922637) internal successors, (1603), 1396 states have internal predecessors, (1603), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 1607 transitions. [2022-03-20 08:05:53,458 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 1607 transitions. Word has length 74 [2022-03-20 08:05:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:53,458 INFO L478 AbstractCegarLoop]: Abstraction has 1401 states and 1607 transitions. [2022-03-20 08:05:53,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 1607 transitions. [2022-03-20 08:05:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 08:05:53,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:53,461 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:53,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 08:05:53,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:53,663 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:53,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1217461719, now seen corresponding path program 7 times [2022-03-20 08:05:53,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:53,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957167435] [2022-03-20 08:05:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:53,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:53,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:05:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 08:05:53,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:05:53,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957167435] [2022-03-20 08:05:53,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957167435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:05:53,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866384654] [2022-03-20 08:05:53,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 08:05:53,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:05:53,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:05:53,816 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:05:53,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 08:05:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:05:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 08:05:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:05:54,843 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:05:54,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-20 08:05:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 08:05:54,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:05:57,063 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-20 08:05:57,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2022-03-20 08:05:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 08:05:57,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866384654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:05:57,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:05:57,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 18] total 44 [2022-03-20 08:05:57,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138798493] [2022-03-20 08:05:57,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:05:57,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 08:05:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:05:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 08:05:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1669, Unknown=3, NotChecked=0, Total=1892 [2022-03-20 08:05:57,124 INFO L87 Difference]: Start difference. First operand 1401 states and 1607 transitions. Second operand has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 43 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:05:59,289 INFO L93 Difference]: Finished difference Result 1923 states and 2172 transitions. [2022-03-20 08:05:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 08:05:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 43 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 08:05:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:05:59,293 INFO L225 Difference]: With dead ends: 1923 [2022-03-20 08:05:59,293 INFO L226 Difference]: Without dead ends: 1341 [2022-03-20 08:05:59,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=940, Invalid=6889, Unknown=3, NotChecked=0, Total=7832 [2022-03-20 08:05:59,294 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 756 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 820 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:05:59,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 146 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1347 Invalid, 0 Unknown, 820 Unchecked, 0.6s Time] [2022-03-20 08:05:59,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-03-20 08:05:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 916. [2022-03-20 08:05:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 911 states have (on average 1.137211855104281) internal successors, (1036), 911 states have internal predecessors, (1036), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1040 transitions. [2022-03-20 08:05:59,606 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1040 transitions. Word has length 81 [2022-03-20 08:05:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:05:59,608 INFO L478 AbstractCegarLoop]: Abstraction has 916 states and 1040 transitions. [2022-03-20 08:05:59,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6136363636363638) internal successors, (159), 43 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:05:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1040 transitions. [2022-03-20 08:05:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 08:05:59,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:05:59,621 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:05:59,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 08:05:59,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 08:05:59,835 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:05:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:05:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -459237146, now seen corresponding path program 8 times [2022-03-20 08:05:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:05:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21785291] [2022-03-20 08:05:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:05:59,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:05:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:00,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-20 08:06:00,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21785291] [2022-03-20 08:06:00,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21785291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:00,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493998728] [2022-03-20 08:06:00,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:06:00,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:00,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:00,219 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:00,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 08:06:00,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:06:00,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:06:00,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 08:06:00,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:01,142 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-20 08:06:01,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-03-20 08:06:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 35 proven. 77 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-03-20 08:06:01,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:03,117 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-03-20 08:06:03,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 37 [2022-03-20 08:06:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 08:06:03,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493998728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:03,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:03,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 18] total 52 [2022-03-20 08:06:03,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030632604] [2022-03-20 08:06:03,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:03,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 08:06:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 08:06:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2333, Unknown=3, NotChecked=0, Total=2652 [2022-03-20 08:06:03,218 INFO L87 Difference]: Start difference. First operand 916 states and 1040 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:06:05,538 INFO L93 Difference]: Finished difference Result 1783 states and 2006 transitions. [2022-03-20 08:06:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 08:06:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-20 08:06:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:06:05,542 INFO L225 Difference]: With dead ends: 1783 [2022-03-20 08:06:05,542 INFO L226 Difference]: Without dead ends: 1537 [2022-03-20 08:06:05,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1049, Invalid=6088, Unknown=3, NotChecked=0, Total=7140 [2022-03-20 08:06:05,543 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 508 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:06:05,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 136 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1750 Invalid, 0 Unknown, 349 Unchecked, 0.6s Time] [2022-03-20 08:06:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-03-20 08:06:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 834. [2022-03-20 08:06:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.1399276236429432) internal successors, (945), 829 states have internal predecessors, (945), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 949 transitions. [2022-03-20 08:06:05,821 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 949 transitions. Word has length 82 [2022-03-20 08:06:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:06:05,821 INFO L478 AbstractCegarLoop]: Abstraction has 834 states and 949 transitions. [2022-03-20 08:06:05,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 51 states have internal predecessors, (159), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 949 transitions. [2022-03-20 08:06:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 08:06:05,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:06:05,822 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:06:05,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 08:06:06,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 08:06:06,039 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:06:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:06:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1483100511, now seen corresponding path program 9 times [2022-03-20 08:06:06,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:06:06,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112057012] [2022-03-20 08:06:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:06,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:06:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:06,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-03-20 08:06:06,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:06,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112057012] [2022-03-20 08:06:06,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112057012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:06,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747510689] [2022-03-20 08:06:06,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:06:06,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:06,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:06,191 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:06,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 08:06:06,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-20 08:06:06,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:06:06,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 08:06:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-03-20 08:06:06,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:07,393 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-03-20 08:06:07,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-03-20 08:06:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-03-20 08:06:07,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747510689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:07,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:07,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-03-20 08:06:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20849472] [2022-03-20 08:06:07,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:07,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 08:06:07,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 08:06:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 08:06:07,570 INFO L87 Difference]: Start difference. First operand 834 states and 949 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:06:13,138 INFO L93 Difference]: Finished difference Result 5570 states and 6403 transitions. [2022-03-20 08:06:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 08:06:13,138 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 08:06:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:06:13,149 INFO L225 Difference]: With dead ends: 5570 [2022-03-20 08:06:13,150 INFO L226 Difference]: Without dead ends: 5252 [2022-03-20 08:06:13,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1766, Invalid=10006, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 08:06:13,152 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 1550 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 3179 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 3179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:06:13,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 186 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 3179 Invalid, 0 Unknown, 35 Unchecked, 1.7s Time] [2022-03-20 08:06:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2022-03-20 08:06:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 995. [2022-03-20 08:06:13,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 990 states have (on average 1.1393939393939394) internal successors, (1128), 990 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1132 transitions. [2022-03-20 08:06:13,530 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1132 transitions. Word has length 83 [2022-03-20 08:06:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:06:13,530 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1132 transitions. [2022-03-20 08:06:13,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1132 transitions. [2022-03-20 08:06:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 08:06:13,532 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:06:13,532 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:06:13,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 08:06:13,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 08:06:13,737 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:06:13,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:06:13,737 INFO L85 PathProgramCache]: Analyzing trace with hash -450086571, now seen corresponding path program 10 times [2022-03-20 08:06:13,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:06:13,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340259532] [2022-03-20 08:06:13,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:13,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:06:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:13,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 08:06:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:13,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340259532] [2022-03-20 08:06:13,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340259532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:13,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793762980] [2022-03-20 08:06:13,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:06:13,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:13,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:13,886 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:13,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 08:06:14,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:06:14,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:06:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 08:06:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 08:06:14,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 08:06:14,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793762980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:14,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:14,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-03-20 08:06:14,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535654432] [2022-03-20 08:06:14,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:14,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 08:06:14,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 08:06:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-20 08:06:14,626 INFO L87 Difference]: Start difference. First operand 995 states and 1132 transitions. Second operand has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 23 states have internal predecessors, (145), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:06:16,166 INFO L93 Difference]: Finished difference Result 1477 states and 1675 transitions. [2022-03-20 08:06:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 08:06:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 23 states have internal predecessors, (145), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 08:06:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:06:16,170 INFO L225 Difference]: With dead ends: 1477 [2022-03-20 08:06:16,170 INFO L226 Difference]: Without dead ends: 1472 [2022-03-20 08:06:16,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 08:06:16,175 INFO L913 BasicCegarLoop]: 139 mSDtfsCounter, 305 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:06:16,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 216 Invalid, 1948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 08:06:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2022-03-20 08:06:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1221. [2022-03-20 08:06:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1216 states have (on average 1.1389802631578947) internal successors, (1385), 1216 states have internal predecessors, (1385), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1389 transitions. [2022-03-20 08:06:16,637 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1389 transitions. Word has length 93 [2022-03-20 08:06:16,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:06:16,637 INFO L478 AbstractCegarLoop]: Abstraction has 1221 states and 1389 transitions. [2022-03-20 08:06:16,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 23 states have internal predecessors, (145), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:16,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1389 transitions. [2022-03-20 08:06:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 08:06:16,639 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:06:16,639 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:06:16,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 08:06:16,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 08:06:16,843 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:06:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:06:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash -743489578, now seen corresponding path program 11 times [2022-03-20 08:06:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:06:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539370120] [2022-03-20 08:06:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:06:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:17,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 08:06:17,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539370120] [2022-03-20 08:06:17,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539370120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334085732] [2022-03-20 08:06:17,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:06:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:17,545 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:17,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 08:06:18,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-20 08:06:18,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:06:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 08:06:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:18,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:06:18,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:06:18,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:06:18,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-20 08:06:18,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-20 08:06:19,293 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 125 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-03-20 08:06:19,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-03-20 08:06:22,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334085732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:22,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:22,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 16] total 54 [2022-03-20 08:06:22,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654269902] [2022-03-20 08:06:22,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:22,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 08:06:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 08:06:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2479, Unknown=3, NotChecked=0, Total=2862 [2022-03-20 08:06:22,318 INFO L87 Difference]: Start difference. First operand 1221 states and 1389 transitions. Second operand has 54 states, 54 states have (on average 3.537037037037037) internal successors, (191), 53 states have internal predecessors, (191), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:06:28,341 INFO L93 Difference]: Finished difference Result 4744 states and 5415 transitions. [2022-03-20 08:06:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 08:06:28,342 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.537037037037037) internal successors, (191), 53 states have internal predecessors, (191), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 08:06:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:06:28,348 INFO L225 Difference]: With dead ends: 4744 [2022-03-20 08:06:28,348 INFO L226 Difference]: Without dead ends: 4383 [2022-03-20 08:06:28,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 178 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6021 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2301, Invalid=16602, Unknown=3, NotChecked=0, Total=18906 [2022-03-20 08:06:28,350 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 1311 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1311 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 3924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:06:28,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1311 Valid, 154 Invalid, 3924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 2973 Invalid, 0 Unknown, 567 Unchecked, 1.4s Time] [2022-03-20 08:06:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2022-03-20 08:06:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 1982. [2022-03-20 08:06:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1977 states have (on average 1.1350531107739) internal successors, (2244), 1977 states have internal predecessors, (2244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2248 transitions. [2022-03-20 08:06:29,127 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2248 transitions. Word has length 93 [2022-03-20 08:06:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:06:29,127 INFO L478 AbstractCegarLoop]: Abstraction has 1982 states and 2248 transitions. [2022-03-20 08:06:29,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.537037037037037) internal successors, (191), 53 states have internal predecessors, (191), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2248 transitions. [2022-03-20 08:06:29,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 08:06:29,130 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:06:29,130 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:06:29,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 08:06:29,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:29,336 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:06:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:06:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1726663992, now seen corresponding path program 12 times [2022-03-20 08:06:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:06:29,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127248534] [2022-03-20 08:06:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:06:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 08:06:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127248534] [2022-03-20 08:06:30,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127248534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500466348] [2022-03-20 08:06:30,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 08:06:30,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:30,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:30,104 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:30,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 08:06:30,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 08:06:30,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:06:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 08:06:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:31,310 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:06:31,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 08:06:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 34 proven. 119 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 08:06:31,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:31,646 INFO L356 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2022-03-20 08:06:31,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 30 [2022-03-20 08:06:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 23 proven. 119 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-20 08:06:31,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500466348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:31,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:31,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 56 [2022-03-20 08:06:31,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430430283] [2022-03-20 08:06:31,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:31,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 08:06:31,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 08:06:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2649, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 08:06:31,912 INFO L87 Difference]: Start difference. First operand 1982 states and 2248 transitions. Second operand has 56 states, 56 states have (on average 3.1964285714285716) internal successors, (179), 55 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:06:44,770 INFO L93 Difference]: Finished difference Result 7684 states and 8833 transitions. [2022-03-20 08:06:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-20 08:06:44,771 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.1964285714285716) internal successors, (179), 55 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 08:06:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:06:44,792 INFO L225 Difference]: With dead ends: 7684 [2022-03-20 08:06:44,792 INFO L226 Difference]: Without dead ends: 6521 [2022-03-20 08:06:44,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 156 SyntacticMatches, 8 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12530 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3989, Invalid=30793, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 08:06:44,796 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 1873 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 4087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:06:44,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 136 Invalid, 4087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 08:06:44,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2022-03-20 08:06:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 3120. [2022-03-20 08:06:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3115 states have (on average 1.1534510433386838) internal successors, (3593), 3115 states have internal predecessors, (3593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:46,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 3597 transitions. [2022-03-20 08:06:46,581 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 3597 transitions. Word has length 93 [2022-03-20 08:06:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:06:46,581 INFO L478 AbstractCegarLoop]: Abstraction has 3120 states and 3597 transitions. [2022-03-20 08:06:46,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.1964285714285716) internal successors, (179), 55 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:46,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 3597 transitions. [2022-03-20 08:06:46,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 08:06:46,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:06:46,587 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:06:46,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 08:06:46,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:46,797 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:06:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:06:46,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2144140246, now seen corresponding path program 13 times [2022-03-20 08:06:46,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:06:46,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712643208] [2022-03-20 08:06:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:46,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:06:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:47,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 08:06:47,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:47,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712643208] [2022-03-20 08:06:47,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712643208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:47,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849626414] [2022-03-20 08:06:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 08:06:47,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:47,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:47,756 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:47,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 08:06:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:47,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 08:06:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:48,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 08:06:48,345 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:06:48,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-03-20 08:06:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 123 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 08:06:48,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:48,540 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-03-20 08:06:48,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 75 [2022-03-20 08:06:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-03-20 08:06:48,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849626414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:48,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:48,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 13] total 40 [2022-03-20 08:06:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652079061] [2022-03-20 08:06:48,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:48,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 08:06:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 08:06:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 08:06:48,678 INFO L87 Difference]: Start difference. First operand 3120 states and 3597 transitions. Second operand has 40 states, 40 states have (on average 4.1) internal successors, (164), 39 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:53,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:06:53,667 INFO L93 Difference]: Finished difference Result 5726 states and 6383 transitions. [2022-03-20 08:06:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 08:06:53,668 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 39 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 08:06:53,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:06:53,675 INFO L225 Difference]: With dead ends: 5726 [2022-03-20 08:06:53,675 INFO L226 Difference]: Without dead ends: 4244 [2022-03-20 08:06:53,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=763, Invalid=4787, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 08:06:53,679 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 659 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:06:53,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 121 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 08:06:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2022-03-20 08:06:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 2996. [2022-03-20 08:06:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2991 states have (on average 1.1350718823136074) internal successors, (3395), 2991 states have internal predecessors, (3395), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 3399 transitions. [2022-03-20 08:06:55,409 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 3399 transitions. Word has length 93 [2022-03-20 08:06:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:06:55,409 INFO L478 AbstractCegarLoop]: Abstraction has 2996 states and 3399 transitions. [2022-03-20 08:06:55,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.1) internal successors, (164), 39 states have internal predecessors, (164), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:06:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 3399 transitions. [2022-03-20 08:06:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 08:06:55,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:06:55,413 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:06:55,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 08:06:55,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 08:06:55,626 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:06:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:06:55,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2047250744, now seen corresponding path program 14 times [2022-03-20 08:06:55,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:06:55,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822562865] [2022-03-20 08:06:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:06:55,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:06:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:56,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:06:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:06:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 08:06:56,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:06:56,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822562865] [2022-03-20 08:06:56,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822562865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:06:56,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472037283] [2022-03-20 08:06:56,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:06:56,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:06:56,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:06:56,736 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:06:56,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 08:06:56,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:06:56,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:06:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 08:06:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:06:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 08:06:57,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 08:06:57,412 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 08:06:57,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-03-20 08:06:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 145 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 08:06:57,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:06:57,657 INFO L356 Elim1Store]: treesize reduction 27, result has 72.2 percent of original size [2022-03-20 08:06:57,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 77 [2022-03-20 08:06:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-03-20 08:06:57,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472037283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:06:57,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:06:57,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 15] total 47 [2022-03-20 08:06:57,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230920797] [2022-03-20 08:06:57,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:06:57,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 08:06:57,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:06:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 08:06:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 08:06:57,863 INFO L87 Difference]: Start difference. First operand 2996 states and 3399 transitions. Second operand has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 46 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:07:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:07:03,460 INFO L93 Difference]: Finished difference Result 4661 states and 5174 transitions. [2022-03-20 08:07:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 08:07:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 46 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 08:07:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:07:03,468 INFO L225 Difference]: With dead ends: 4661 [2022-03-20 08:07:03,469 INFO L226 Difference]: Without dead ends: 4217 [2022-03-20 08:07:03,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1086, Invalid=8034, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 08:07:03,471 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 798 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:07:03,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 106 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 08:07:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2022-03-20 08:07:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2992. [2022-03-20 08:07:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2992 states, 2987 states have (on average 1.1352527619685302) internal successors, (3391), 2987 states have internal predecessors, (3391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:07:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 3395 transitions. [2022-03-20 08:07:05,353 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 3395 transitions. Word has length 93 [2022-03-20 08:07:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:07:05,353 INFO L478 AbstractCegarLoop]: Abstraction has 2992 states and 3395 transitions. [2022-03-20 08:07:05,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 46 states have internal predecessors, (175), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:07:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 3395 transitions. [2022-03-20 08:07:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 08:07:05,358 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:07:05,358 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:07:05,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 08:07:05,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:07:05,566 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:07:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:07:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1778286904, now seen corresponding path program 15 times [2022-03-20 08:07:05,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:07:05,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838883753] [2022-03-20 08:07:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:07:05,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:07:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:07:06,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:07:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:07:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 82 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 08:07:06,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:07:06,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838883753] [2022-03-20 08:07:06,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838883753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:07:06,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926225940] [2022-03-20 08:07:06,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:07:06,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:07:06,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:07:06,342 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:07:06,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 08:07:06,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-20 08:07:06,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:07:06,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 175 conjunts are in the unsatisfiable core [2022-03-20 08:07:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:07:06,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 08:07:06,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 08:07:06,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 08:07:06,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-20 08:07:06,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-20 08:07:06,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-20 08:07:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 58 proven. 112 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 08:07:19,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:07:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 23 proven. 144 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:07:44,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926225940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:07:44,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:07:44,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 48, 53] total 114 [2022-03-20 08:07:44,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191154020] [2022-03-20 08:07:44,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:07:44,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-20 08:07:44,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:07:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-20 08:07:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1902, Invalid=10979, Unknown=1, NotChecked=0, Total=12882 [2022-03-20 08:07:44,355 INFO L87 Difference]: Start difference. First operand 2992 states and 3395 transitions. Second operand has 114 states, 114 states have (on average 1.8333333333333333) internal successors, (209), 113 states have internal predecessors, (209), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:08:25,280 WARN L232 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 119 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:08:50,964 WARN L232 SmtUtils]: Spent 21.55s on a formula simplification. DAG size of input: 125 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:09:16,730 WARN L232 SmtUtils]: Spent 20.18s on a formula simplification. DAG size of input: 124 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:09:45,307 WARN L232 SmtUtils]: Spent 15.71s on a formula simplification. DAG size of input: 143 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:10:13,781 WARN L232 SmtUtils]: Spent 25.88s on a formula simplification. DAG size of input: 149 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:10:59,761 WARN L232 SmtUtils]: Spent 20.73s on a formula simplification. DAG size of input: 150 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:12:57,435 WARN L232 SmtUtils]: Spent 1.70m on a formula simplification. DAG size of input: 129 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:14:39,350 WARN L232 SmtUtils]: Spent 1.39m on a formula simplification. DAG size of input: 136 DAG size of output: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:15:16,386 WARN L232 SmtUtils]: Spent 16.11s on a formula simplification. DAG size of input: 112 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:15:52,832 WARN L232 SmtUtils]: Spent 10.75s on a formula simplification. DAG size of input: 103 DAG size of output: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:16:59,149 WARN L232 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 173 DAG size of output: 155 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:17:07,128 WARN L232 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 107 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 08:17:15,013 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-20 08:17:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-20 08:17:15,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 134 SyntacticMatches, 24 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26729 ImplicationChecksByTransitivity, 581.9s TimeCoverageRelationStatistics Valid=9646, Invalid=60804, Unknown=40, NotChecked=0, Total=70490 [2022-03-20 08:17:15,016 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 1187 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 3962 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 6594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 3962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1879 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:17:15,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 283 Invalid, 6594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 3962 Invalid, 0 Unknown, 1879 Unchecked, 3.1s Time] [2022-03-20 08:17:15,023 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 101 [2022-03-20 08:17:15,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 08:17:15,217 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:17:15,218 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:894) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:853) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:770) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:470) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:421) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 49 more [2022-03-20 08:17:15,221 INFO L158 Benchmark]: Toolchain (without parser) took 757844.99ms. Allocated memory was 196.1MB in the beginning and 879.8MB in the end (delta: 683.7MB). Free memory was 171.5MB in the beginning and 810.1MB in the end (delta: -638.5MB). Peak memory consumption was 44.4MB. Max. memory is 8.0GB. [2022-03-20 08:17:15,221 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 196.1MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:17:15,221 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.18ms. Allocated memory is still 196.1MB. Free memory was 171.2MB in the beginning and 168.8MB in the end (delta: 2.5MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-20 08:17:15,221 INFO L158 Benchmark]: Boogie Preprocessor took 40.39ms. Allocated memory is still 196.1MB. Free memory was 168.8MB in the beginning and 167.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:17:15,221 INFO L158 Benchmark]: RCFGBuilder took 326.24ms. Allocated memory is still 196.1MB. Free memory was 167.0MB in the beginning and 154.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 08:17:15,221 INFO L158 Benchmark]: IcfgTransformer took 27.44ms. Allocated memory is still 196.1MB. Free memory was 154.4MB in the beginning and 152.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:17:15,222 INFO L158 Benchmark]: TraceAbstraction took 757167.59ms. Allocated memory was 196.1MB in the beginning and 879.8MB in the end (delta: 683.7MB). Free memory was 152.3MB in the beginning and 810.1MB in the end (delta: -657.7MB). Peak memory consumption was 26.7MB. Max. memory is 8.0GB. [2022-03-20 08:17:15,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 196.1MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 279.18ms. Allocated memory is still 196.1MB. Free memory was 171.2MB in the beginning and 168.8MB in the end (delta: 2.5MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.39ms. Allocated memory is still 196.1MB. Free memory was 168.8MB in the beginning and 167.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 326.24ms. Allocated memory is still 196.1MB. Free memory was 167.0MB in the beginning and 154.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 27.44ms. Allocated memory is still 196.1MB. Free memory was 154.4MB in the beginning and 152.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 757167.59ms. Allocated memory was 196.1MB in the beginning and 879.8MB in the end (delta: 683.7MB). Free memory was 152.3MB in the beginning and 810.1MB in the end (delta: -657.7MB). Peak memory consumption was 26.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...