/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:14:41,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:14:41,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:14:41,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:14:41,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:14:41,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:14:41,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:14:41,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:14:41,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:14:41,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:14:41,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:14:41,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:14:41,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:14:41,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:14:41,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:14:41,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:14:41,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:14:41,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:14:41,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:14:41,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:14:41,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:14:41,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:14:41,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:14:41,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:14:41,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:14:41,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:14:41,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:14:41,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:14:41,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:14:41,799 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:14:41,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:14:41,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:14:41,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:14:41,801 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:14:41,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:14:41,802 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:14:41,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:14:41,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:14:41,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:14:41,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:14:41,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:14:41,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:14:41,804 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:14:41,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:14:41,805 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:14:41,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:14:41,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:14:41,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:14:41,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:14:41,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:14:41,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:14:41,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:14:41,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:14:41,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:14:41,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:14:41,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:14:41,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:14:41,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-07 01:14:42,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:14:42,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:14:42,110 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:14:42,112 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:14:42,112 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:14:42,113 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-11-07 01:14:42,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d673a32/5ba3562d203b4971b3e5d7c5e3556095/FLAG88b1b765b [2019-11-07 01:14:42,683 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:14:42,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/token_ring.02.cil-1.c [2019-11-07 01:14:42,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d673a32/5ba3562d203b4971b3e5d7c5e3556095/FLAG88b1b765b [2019-11-07 01:14:43,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00d673a32/5ba3562d203b4971b3e5d7c5e3556095 [2019-11-07 01:14:43,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:14:43,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:14:43,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:14:43,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:14:43,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:14:43,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f0f0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43, skipping insertion in model container [2019-11-07 01:14:43,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,073 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:14:43,128 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:14:43,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:14:43,360 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:14:43,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:14:43,532 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:14:43,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43 WrapperNode [2019-11-07 01:14:43,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:14:43,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:14:43,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:14:43,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:14:43,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... [2019-11-07 01:14:43,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:14:43,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:14:43,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:14:43,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:14:43,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:14:43,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:14:43,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:14:43,642 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-11-07 01:14:43,642 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2019-11-07 01:14:43,642 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2019-11-07 01:14:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2019-11-07 01:14:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2019-11-07 01:14:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2019-11-07 01:14:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2019-11-07 01:14:43,643 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2019-11-07 01:14:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-11-07 01:14:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-11-07 01:14:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-11-07 01:14:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2019-11-07 01:14:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2019-11-07 01:14:43,644 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2019-11-07 01:14:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2019-11-07 01:14:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2019-11-07 01:14:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2019-11-07 01:14:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-11-07 01:14:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-11-07 01:14:43,645 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-11-07 01:14:43,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:14:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:14:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-11-07 01:14:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2019-11-07 01:14:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2019-11-07 01:14:43,646 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2019-11-07 01:14:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2019-11-07 01:14:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:14:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure master [2019-11-07 01:14:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2019-11-07 01:14:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2019-11-07 01:14:43,647 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2019-11-07 01:14:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-11-07 01:14:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-11-07 01:14:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-11-07 01:14:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2019-11-07 01:14:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2019-11-07 01:14:43,648 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2019-11-07 01:14:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2019-11-07 01:14:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2019-11-07 01:14:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-11-07 01:14:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-11-07 01:14:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-11-07 01:14:43,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:14:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:14:43,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:14:44,279 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:14:44,279 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 01:14:44,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:44 BoogieIcfgContainer [2019-11-07 01:14:44,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:14:44,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:14:44,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:14:44,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:14:44,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:14:43" (1/3) ... [2019-11-07 01:14:44,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7088e6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:44, skipping insertion in model container [2019-11-07 01:14:44,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:14:43" (2/3) ... [2019-11-07 01:14:44,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7088e6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:14:44, skipping insertion in model container [2019-11-07 01:14:44,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:14:44" (3/3) ... [2019-11-07 01:14:44,298 INFO L109 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-1.c [2019-11-07 01:14:44,311 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:14:44,334 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:14:44,346 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:14:44,387 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:14:44,388 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:14:44,388 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:14:44,388 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:14:44,389 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:14:44,389 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:14:44,389 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:14:44,389 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:14:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states. [2019-11-07 01:14:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 01:14:44,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:44,432 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:14:44,434 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:44,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1715943758, now seen corresponding path program 1 times [2019-11-07 01:14:44,451 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:44,451 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960026173] [2019-11-07 01:14:44,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:44,874 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960026173] [2019-11-07 01:14:44,875 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:44,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:44,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097178579] [2019-11-07 01:14:44,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:44,888 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:44,910 INFO L87 Difference]: Start difference. First operand 174 states. Second operand 5 states. [2019-11-07 01:14:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:45,657 INFO L93 Difference]: Finished difference Result 361 states and 528 transitions. [2019-11-07 01:14:45,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:45,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-11-07 01:14:45,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:45,675 INFO L225 Difference]: With dead ends: 361 [2019-11-07 01:14:45,675 INFO L226 Difference]: Without dead ends: 195 [2019-11-07 01:14:45,681 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-07 01:14:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 165. [2019-11-07 01:14:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-07 01:14:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 222 transitions. [2019-11-07 01:14:45,761 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 222 transitions. Word has length 91 [2019-11-07 01:14:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:45,762 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 222 transitions. [2019-11-07 01:14:45,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 222 transitions. [2019-11-07 01:14:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 01:14:45,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:45,768 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:14:45,768 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1625083380, now seen corresponding path program 1 times [2019-11-07 01:14:45,769 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:45,769 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365852842] [2019-11-07 01:14:45,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:45,881 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365852842] [2019-11-07 01:14:45,881 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:45,881 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:45,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044903760] [2019-11-07 01:14:45,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:45,884 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:45,885 INFO L87 Difference]: Start difference. First operand 165 states and 222 transitions. Second operand 5 states. [2019-11-07 01:14:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:46,428 INFO L93 Difference]: Finished difference Result 338 states and 470 transitions. [2019-11-07 01:14:46,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:46,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-11-07 01:14:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:46,432 INFO L225 Difference]: With dead ends: 338 [2019-11-07 01:14:46,432 INFO L226 Difference]: Without dead ends: 193 [2019-11-07 01:14:46,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-07 01:14:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 165. [2019-11-07 01:14:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-07 01:14:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 221 transitions. [2019-11-07 01:14:46,461 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 221 transitions. Word has length 91 [2019-11-07 01:14:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:46,461 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 221 transitions. [2019-11-07 01:14:46,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 221 transitions. [2019-11-07 01:14:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 01:14:46,465 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:46,465 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:14:46,466 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:46,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:46,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1453730190, now seen corresponding path program 1 times [2019-11-07 01:14:46,467 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:46,467 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775080063] [2019-11-07 01:14:46,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:46,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775080063] [2019-11-07 01:14:46,621 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:46,621 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:46,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786760748] [2019-11-07 01:14:46,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:46,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:46,626 INFO L87 Difference]: Start difference. First operand 165 states and 221 transitions. Second operand 5 states. [2019-11-07 01:14:47,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:47,033 INFO L93 Difference]: Finished difference Result 355 states and 496 transitions. [2019-11-07 01:14:47,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:47,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-11-07 01:14:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:47,037 INFO L225 Difference]: With dead ends: 355 [2019-11-07 01:14:47,037 INFO L226 Difference]: Without dead ends: 210 [2019-11-07 01:14:47,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2019-11-07 01:14:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2019-11-07 01:14:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-07 01:14:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 220 transitions. [2019-11-07 01:14:47,064 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 220 transitions. Word has length 91 [2019-11-07 01:14:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:47,064 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 220 transitions. [2019-11-07 01:14:47,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 220 transitions. [2019-11-07 01:14:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 01:14:47,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:47,067 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:14:47,067 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:47,068 INFO L82 PathProgramCache]: Analyzing trace with hash 721762764, now seen corresponding path program 1 times [2019-11-07 01:14:47,068 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:47,068 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675961871] [2019-11-07 01:14:47,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:47,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675961871] [2019-11-07 01:14:47,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:47,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:47,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053007511] [2019-11-07 01:14:47,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:47,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:47,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:47,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:47,159 INFO L87 Difference]: Start difference. First operand 165 states and 220 transitions. Second operand 5 states. [2019-11-07 01:14:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:47,716 INFO L93 Difference]: Finished difference Result 349 states and 485 transitions. [2019-11-07 01:14:47,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:47,716 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-11-07 01:14:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:47,719 INFO L225 Difference]: With dead ends: 349 [2019-11-07 01:14:47,719 INFO L226 Difference]: Without dead ends: 204 [2019-11-07 01:14:47,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-07 01:14:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2019-11-07 01:14:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-07 01:14:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 219 transitions. [2019-11-07 01:14:47,742 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 219 transitions. Word has length 91 [2019-11-07 01:14:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:47,743 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 219 transitions. [2019-11-07 01:14:47,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 219 transitions. [2019-11-07 01:14:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 01:14:47,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:47,745 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:14:47,745 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:47,746 INFO L82 PathProgramCache]: Analyzing trace with hash -964417074, now seen corresponding path program 1 times [2019-11-07 01:14:47,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:47,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716059777] [2019-11-07 01:14:47,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:47,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716059777] [2019-11-07 01:14:47,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:47,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:14:47,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296238996] [2019-11-07 01:14:47,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:47,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:14:47,854 INFO L87 Difference]: Start difference. First operand 165 states and 219 transitions. Second operand 5 states. [2019-11-07 01:14:48,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:48,222 INFO L93 Difference]: Finished difference Result 351 states and 484 transitions. [2019-11-07 01:14:48,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:48,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-11-07 01:14:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:48,225 INFO L225 Difference]: With dead ends: 351 [2019-11-07 01:14:48,226 INFO L226 Difference]: Without dead ends: 206 [2019-11-07 01:14:48,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:14:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-07 01:14:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2019-11-07 01:14:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-07 01:14:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2019-11-07 01:14:48,247 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 91 [2019-11-07 01:14:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:48,247 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2019-11-07 01:14:48,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2019-11-07 01:14:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 01:14:48,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:48,249 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:14:48,250 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1018809972, now seen corresponding path program 1 times [2019-11-07 01:14:48,250 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:48,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480366434] [2019-11-07 01:14:48,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:48,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480366434] [2019-11-07 01:14:48,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:48,327 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:48,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818487110] [2019-11-07 01:14:48,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:48,328 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:48,329 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand 4 states. [2019-11-07 01:14:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:48,549 INFO L93 Difference]: Finished difference Result 445 states and 615 transitions. [2019-11-07 01:14:48,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:48,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2019-11-07 01:14:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:48,553 INFO L225 Difference]: With dead ends: 445 [2019-11-07 01:14:48,553 INFO L226 Difference]: Without dead ends: 301 [2019-11-07 01:14:48,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-07 01:14:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2019-11-07 01:14:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2019-11-07 01:14:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 395 transitions. [2019-11-07 01:14:48,596 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 395 transitions. Word has length 91 [2019-11-07 01:14:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:48,597 INFO L462 AbstractCegarLoop]: Abstraction has 300 states and 395 transitions. [2019-11-07 01:14:48,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:48,598 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 395 transitions. [2019-11-07 01:14:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 01:14:48,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:48,603 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:48,604 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:48,604 INFO L82 PathProgramCache]: Analyzing trace with hash -207780250, now seen corresponding path program 1 times [2019-11-07 01:14:48,604 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:48,605 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604650856] [2019-11-07 01:14:48,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:14:48,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604650856] [2019-11-07 01:14:48,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884625566] [2019-11-07 01:14:48,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:48,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:14:48,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-07 01:14:48,958 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:14:49,116 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:49,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-07 01:14:49,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121211849] [2019-11-07 01:14:49,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:49,118 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:49,119 INFO L87 Difference]: Start difference. First operand 300 states and 395 transitions. Second operand 3 states. [2019-11-07 01:14:49,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:49,182 INFO L93 Difference]: Finished difference Result 844 states and 1154 transitions. [2019-11-07 01:14:49,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:49,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 145 [2019-11-07 01:14:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:49,191 INFO L225 Difference]: With dead ends: 844 [2019-11-07 01:14:49,192 INFO L226 Difference]: Without dead ends: 566 [2019-11-07 01:14:49,194 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2019-11-07 01:14:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 557. [2019-11-07 01:14:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2019-11-07 01:14:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 762 transitions. [2019-11-07 01:14:49,293 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 762 transitions. Word has length 145 [2019-11-07 01:14:49,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:49,295 INFO L462 AbstractCegarLoop]: Abstraction has 557 states and 762 transitions. [2019-11-07 01:14:49,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 762 transitions. [2019-11-07 01:14:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-07 01:14:49,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:49,302 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:49,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:49,510 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:49,511 INFO L82 PathProgramCache]: Analyzing trace with hash -192127148, now seen corresponding path program 1 times [2019-11-07 01:14:49,511 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:49,511 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801452909] [2019-11-07 01:14:49,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 01:14:49,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801452909] [2019-11-07 01:14:49,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936283958] [2019-11-07 01:14:49,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:49,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:14:49,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:14:49,763 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 01:14:49,938 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:49,938 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 7 [2019-11-07 01:14:49,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687778418] [2019-11-07 01:14:49,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:49,939 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:49,940 INFO L87 Difference]: Start difference. First operand 557 states and 762 transitions. Second operand 3 states. [2019-11-07 01:14:50,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:50,029 INFO L93 Difference]: Finished difference Result 1585 states and 2286 transitions. [2019-11-07 01:14:50,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:50,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-11-07 01:14:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:50,038 INFO L225 Difference]: With dead ends: 1585 [2019-11-07 01:14:50,039 INFO L226 Difference]: Without dead ends: 1056 [2019-11-07 01:14:50,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:14:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-11-07 01:14:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1054. [2019-11-07 01:14:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1054 states. [2019-11-07 01:14:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1506 transitions. [2019-11-07 01:14:50,130 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1506 transitions. Word has length 164 [2019-11-07 01:14:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:50,130 INFO L462 AbstractCegarLoop]: Abstraction has 1054 states and 1506 transitions. [2019-11-07 01:14:50,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1506 transitions. [2019-11-07 01:14:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-07 01:14:50,135 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:50,136 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:50,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:50,348 INFO L410 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash 845462503, now seen corresponding path program 1 times [2019-11-07 01:14:50,348 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:50,348 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958558167] [2019-11-07 01:14:50,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-07 01:14:50,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958558167] [2019-11-07 01:14:50,414 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068128190] [2019-11-07 01:14:50,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:50,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:14:50,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:14:50,633 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:14:50,820 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:50,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2019-11-07 01:14:50,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013902098] [2019-11-07 01:14:50,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:50,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:50,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:50,824 INFO L87 Difference]: Start difference. First operand 1054 states and 1506 transitions. Second operand 4 states. [2019-11-07 01:14:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:51,149 INFO L93 Difference]: Finished difference Result 3056 states and 4734 transitions. [2019-11-07 01:14:51,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:51,149 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 165 [2019-11-07 01:14:51,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:51,167 INFO L225 Difference]: With dead ends: 3056 [2019-11-07 01:14:51,167 INFO L226 Difference]: Without dead ends: 2039 [2019-11-07 01:14:51,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:51,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2019-11-07 01:14:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2028. [2019-11-07 01:14:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2028 states. [2019-11-07 01:14:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 2895 transitions. [2019-11-07 01:14:51,498 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 2895 transitions. Word has length 165 [2019-11-07 01:14:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:51,498 INFO L462 AbstractCegarLoop]: Abstraction has 2028 states and 2895 transitions. [2019-11-07 01:14:51,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 2895 transitions. [2019-11-07 01:14:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 01:14:51,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:51,508 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:51,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:51,714 INFO L410 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1103265442, now seen corresponding path program 1 times [2019-11-07 01:14:51,716 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:51,716 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744226214] [2019-11-07 01:14:51,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:14:51,780 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744226214] [2019-11-07 01:14:51,780 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:51,780 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:51,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875840014] [2019-11-07 01:14:51,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:51,781 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:51,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:51,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:51,782 INFO L87 Difference]: Start difference. First operand 2028 states and 2895 transitions. Second operand 4 states. [2019-11-07 01:14:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:52,022 INFO L93 Difference]: Finished difference Result 3676 states and 5168 transitions. [2019-11-07 01:14:52,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:52,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-07 01:14:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:52,036 INFO L225 Difference]: With dead ends: 3676 [2019-11-07 01:14:52,037 INFO L226 Difference]: Without dead ends: 1674 [2019-11-07 01:14:52,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2019-11-07 01:14:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1674. [2019-11-07 01:14:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-11-07 01:14:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2308 transitions. [2019-11-07 01:14:52,196 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2308 transitions. Word has length 145 [2019-11-07 01:14:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:52,197 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2308 transitions. [2019-11-07 01:14:52,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:52,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2308 transitions. [2019-11-07 01:14:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-07 01:14:52,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:52,202 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:52,202 INFO L410 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1157831070, now seen corresponding path program 1 times [2019-11-07 01:14:52,203 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:52,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710237551] [2019-11-07 01:14:52,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:14:52,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710237551] [2019-11-07 01:14:52,285 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:14:52,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:14:52,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152866242] [2019-11-07 01:14:52,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:52,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:52,287 INFO L87 Difference]: Start difference. First operand 1674 states and 2308 transitions. Second operand 4 states. [2019-11-07 01:14:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:52,539 INFO L93 Difference]: Finished difference Result 2923 states and 4005 transitions. [2019-11-07 01:14:52,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:52,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 145 [2019-11-07 01:14:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:52,555 INFO L225 Difference]: With dead ends: 2923 [2019-11-07 01:14:52,555 INFO L226 Difference]: Without dead ends: 1270 [2019-11-07 01:14:52,564 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:14:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2019-11-07 01:14:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1270. [2019-11-07 01:14:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1270 states. [2019-11-07 01:14:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1722 transitions. [2019-11-07 01:14:52,704 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1722 transitions. Word has length 145 [2019-11-07 01:14:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:52,704 INFO L462 AbstractCegarLoop]: Abstraction has 1270 states and 1722 transitions. [2019-11-07 01:14:52,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1722 transitions. [2019-11-07 01:14:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-07 01:14:52,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:52,710 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:52,711 INFO L410 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1844265150, now seen corresponding path program 1 times [2019-11-07 01:14:52,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:52,712 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967899353] [2019-11-07 01:14:52,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:14:52,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967899353] [2019-11-07 01:14:52,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421535394] [2019-11-07 01:14:52,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:52,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:14:53,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:14:53,039 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-07 01:14:53,200 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:53,200 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 9 [2019-11-07 01:14:53,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052475952] [2019-11-07 01:14:53,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:53,205 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:53,205 INFO L87 Difference]: Start difference. First operand 1270 states and 1722 transitions. Second operand 5 states. [2019-11-07 01:14:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:53,721 INFO L93 Difference]: Finished difference Result 2144 states and 2951 transitions. [2019-11-07 01:14:53,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:14:53,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2019-11-07 01:14:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:53,736 INFO L225 Difference]: With dead ends: 2144 [2019-11-07 01:14:53,736 INFO L226 Difference]: Without dead ends: 1380 [2019-11-07 01:14:53,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:14:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2019-11-07 01:14:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1377. [2019-11-07 01:14:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1377 states. [2019-11-07 01:14:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 1833 transitions. [2019-11-07 01:14:53,952 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 1833 transitions. Word has length 146 [2019-11-07 01:14:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:53,953 INFO L462 AbstractCegarLoop]: Abstraction has 1377 states and 1833 transitions. [2019-11-07 01:14:53,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:14:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 1833 transitions. [2019-11-07 01:14:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-07 01:14:53,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:53,964 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:54,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:54,169 INFO L410 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash -217931108, now seen corresponding path program 1 times [2019-11-07 01:14:54,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:54,170 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485007922] [2019-11-07 01:14:54,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-07 01:14:54,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485007922] [2019-11-07 01:14:54,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850965106] [2019-11-07 01:14:54,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:54,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:14:54,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-07 01:14:54,568 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-07 01:14:54,734 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:54,734 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2019-11-07 01:14:54,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130070169] [2019-11-07 01:14:54,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:14:54,735 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:54,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:14:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:54,736 INFO L87 Difference]: Start difference. First operand 1377 states and 1833 transitions. Second operand 3 states. [2019-11-07 01:14:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:54,937 INFO L93 Difference]: Finished difference Result 4020 states and 5563 transitions. [2019-11-07 01:14:54,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:14:54,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2019-11-07 01:14:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:54,956 INFO L225 Difference]: With dead ends: 4020 [2019-11-07 01:14:54,957 INFO L226 Difference]: Without dead ends: 2664 [2019-11-07 01:14:54,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 373 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2019-11-07 01:14:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2637. [2019-11-07 01:14:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2637 states. [2019-11-07 01:14:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3532 transitions. [2019-11-07 01:14:55,218 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3532 transitions. Word has length 190 [2019-11-07 01:14:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:55,218 INFO L462 AbstractCegarLoop]: Abstraction has 2637 states and 3532 transitions. [2019-11-07 01:14:55,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:14:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3532 transitions. [2019-11-07 01:14:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-07 01:14:55,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:55,234 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:55,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:55,447 INFO L410 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1809844547, now seen corresponding path program 1 times [2019-11-07 01:14:55,448 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:55,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381951730] [2019-11-07 01:14:55,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-07 01:14:55,582 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381951730] [2019-11-07 01:14:55,582 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709614003] [2019-11-07 01:14:55,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:55,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:14:55,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:14:55,812 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-07 01:14:55,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:55,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2019-11-07 01:14:55,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616584007] [2019-11-07 01:14:55,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:14:55,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:55,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:14:55,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:55,985 INFO L87 Difference]: Start difference. First operand 2637 states and 3532 transitions. Second operand 4 states. [2019-11-07 01:14:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:56,368 INFO L93 Difference]: Finished difference Result 5526 states and 7623 transitions. [2019-11-07 01:14:56,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:14:56,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2019-11-07 01:14:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:56,394 INFO L225 Difference]: With dead ends: 5526 [2019-11-07 01:14:56,394 INFO L226 Difference]: Without dead ends: 2911 [2019-11-07 01:14:56,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 411 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:14:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-11-07 01:14:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2633. [2019-11-07 01:14:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2633 states. [2019-11-07 01:14:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 3449 transitions. [2019-11-07 01:14:56,703 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 3449 transitions. Word has length 209 [2019-11-07 01:14:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:56,704 INFO L462 AbstractCegarLoop]: Abstraction has 2633 states and 3449 transitions. [2019-11-07 01:14:56,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:14:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 3449 transitions. [2019-11-07 01:14:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-11-07 01:14:56,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:56,715 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:14:56,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:56,927 INFO L410 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1712386816, now seen corresponding path program 1 times [2019-11-07 01:14:56,928 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:56,928 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174559152] [2019-11-07 01:14:56,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-07 01:14:57,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174559152] [2019-11-07 01:14:57,016 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838832421] [2019-11-07 01:14:57,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:57,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:14:57,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-07 01:14:57,255 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-11-07 01:14:57,501 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:14:57,502 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 10 [2019-11-07 01:14:57,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920288116] [2019-11-07 01:14:57,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:14:57,503 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:14:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:14:57,504 INFO L87 Difference]: Start difference. First operand 2633 states and 3449 transitions. Second operand 6 states. [2019-11-07 01:14:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:14:58,387 INFO L93 Difference]: Finished difference Result 6043 states and 8501 transitions. [2019-11-07 01:14:58,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:14:58,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 210 [2019-11-07 01:14:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:14:58,413 INFO L225 Difference]: With dead ends: 6043 [2019-11-07 01:14:58,414 INFO L226 Difference]: Without dead ends: 3432 [2019-11-07 01:14:58,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 413 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:14:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2019-11-07 01:14:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 2982. [2019-11-07 01:14:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2019-11-07 01:14:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 3796 transitions. [2019-11-07 01:14:58,796 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 3796 transitions. Word has length 210 [2019-11-07 01:14:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:14:58,797 INFO L462 AbstractCegarLoop]: Abstraction has 2982 states and 3796 transitions. [2019-11-07 01:14:58,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:14:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 3796 transitions. [2019-11-07 01:14:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-11-07 01:14:58,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:14:58,812 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:14:59,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:59,016 INFO L410 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:14:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:14:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash -227362850, now seen corresponding path program 1 times [2019-11-07 01:14:59,017 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:14:59,017 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688610961] [2019-11-07 01:14:59,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:14:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-11-07 01:14:59,214 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688610961] [2019-11-07 01:14:59,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44380072] [2019-11-07 01:14:59,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:14:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:14:59,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:14:59,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:14:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-11-07 01:14:59,550 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:14:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-07 01:14:59,850 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:14:59,850 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:14:59,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909378164] [2019-11-07 01:14:59,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:14:59,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:14:59,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:14:59,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:14:59,854 INFO L87 Difference]: Start difference. First operand 2982 states and 3796 transitions. Second operand 5 states. [2019-11-07 01:15:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:00,833 INFO L93 Difference]: Finished difference Result 9354 states and 12193 transitions. [2019-11-07 01:15:00,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:15:00,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2019-11-07 01:15:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:00,878 INFO L225 Difference]: With dead ends: 9354 [2019-11-07 01:15:00,879 INFO L226 Difference]: Without dead ends: 6392 [2019-11-07 01:15:00,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 599 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:15:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2019-11-07 01:15:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 5939. [2019-11-07 01:15:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5939 states. [2019-11-07 01:15:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 7531 transitions. [2019-11-07 01:15:01,472 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 7531 transitions. Word has length 304 [2019-11-07 01:15:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:01,473 INFO L462 AbstractCegarLoop]: Abstraction has 5939 states and 7531 transitions. [2019-11-07 01:15:01,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:15:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 7531 transitions. [2019-11-07 01:15:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-11-07 01:15:01,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:01,487 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:15:01,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:01,696 INFO L410 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:01,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2127793702, now seen corresponding path program 1 times [2019-11-07 01:15:01,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:01,697 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550988782] [2019-11-07 01:15:01,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-11-07 01:15:01,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550988782] [2019-11-07 01:15:01,809 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775148127] [2019-11-07 01:15:01,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:02,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:15:02,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-11-07 01:15:02,103 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-07 01:15:02,458 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:02,458 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:15:02,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608674806] [2019-11-07 01:15:02,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:15:02,459 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:15:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:15:02,460 INFO L87 Difference]: Start difference. First operand 5939 states and 7531 transitions. Second operand 5 states. [2019-11-07 01:15:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:03,053 INFO L93 Difference]: Finished difference Result 11856 states and 15126 transitions. [2019-11-07 01:15:03,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 01:15:03,053 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2019-11-07 01:15:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:03,090 INFO L225 Difference]: With dead ends: 11856 [2019-11-07 01:15:03,090 INFO L226 Difference]: Without dead ends: 5939 [2019-11-07 01:15:03,111 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 599 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-07 01:15:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5939 states. [2019-11-07 01:15:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5939 to 5939. [2019-11-07 01:15:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5939 states. [2019-11-07 01:15:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 7441 transitions. [2019-11-07 01:15:03,636 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 7441 transitions. Word has length 304 [2019-11-07 01:15:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:03,636 INFO L462 AbstractCegarLoop]: Abstraction has 5939 states and 7441 transitions. [2019-11-07 01:15:03,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:15:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 7441 transitions. [2019-11-07 01:15:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-11-07 01:15:03,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:03,650 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-07 01:15:03,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:03,853 INFO L410 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1065036266, now seen corresponding path program 1 times [2019-11-07 01:15:03,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:03,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108239372] [2019-11-07 01:15:03,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-11-07 01:15:03,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108239372] [2019-11-07 01:15:03,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600458874] [2019-11-07 01:15:03,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:04,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:15:04,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-11-07 01:15:04,290 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-07 01:15:04,652 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:04,653 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:15:04,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049125851] [2019-11-07 01:15:04,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:15:04,654 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:15:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:15:04,655 INFO L87 Difference]: Start difference. First operand 5939 states and 7441 transitions. Second operand 5 states. [2019-11-07 01:15:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:05,650 INFO L93 Difference]: Finished difference Result 13240 states and 18014 transitions. [2019-11-07 01:15:05,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:15:05,651 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 304 [2019-11-07 01:15:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:05,690 INFO L225 Difference]: With dead ends: 13240 [2019-11-07 01:15:05,691 INFO L226 Difference]: Without dead ends: 7323 [2019-11-07 01:15:05,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 599 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-07 01:15:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7323 states. [2019-11-07 01:15:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7323 to 6545. [2019-11-07 01:15:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6545 states. [2019-11-07 01:15:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6545 states to 6545 states and 8113 transitions. [2019-11-07 01:15:06,182 INFO L78 Accepts]: Start accepts. Automaton has 6545 states and 8113 transitions. Word has length 304 [2019-11-07 01:15:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:06,182 INFO L462 AbstractCegarLoop]: Abstraction has 6545 states and 8113 transitions. [2019-11-07 01:15:06,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:15:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6545 states and 8113 transitions. [2019-11-07 01:15:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-07 01:15:06,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:06,194 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:06,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:06,400 INFO L410 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:06,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2090526700, now seen corresponding path program 1 times [2019-11-07 01:15:06,401 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:06,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350610143] [2019-11-07 01:15:06,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:15:06,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350610143] [2019-11-07 01:15:06,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466413708] [2019-11-07 01:15:06,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:06,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-07 01:15:06,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-11-07 01:15:06,872 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-07 01:15:07,030 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:07,030 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 6 [2019-11-07 01:15:07,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554131760] [2019-11-07 01:15:07,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:15:07,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:07,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:15:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:15:07,031 INFO L87 Difference]: Start difference. First operand 6545 states and 8113 transitions. Second operand 6 states. [2019-11-07 01:15:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:07,585 INFO L93 Difference]: Finished difference Result 13189 states and 16896 transitions. [2019-11-07 01:15:07,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:15:07,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2019-11-07 01:15:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:07,619 INFO L225 Difference]: With dead ends: 13189 [2019-11-07 01:15:07,619 INFO L226 Difference]: Without dead ends: 6665 [2019-11-07 01:15:07,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:15:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2019-11-07 01:15:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 6665. [2019-11-07 01:15:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6665 states. [2019-11-07 01:15:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 8119 transitions. [2019-11-07 01:15:08,175 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 8119 transitions. Word has length 211 [2019-11-07 01:15:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:08,176 INFO L462 AbstractCegarLoop]: Abstraction has 6665 states and 8119 transitions. [2019-11-07 01:15:08,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:15:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 8119 transitions. [2019-11-07 01:15:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-07 01:15:08,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:08,186 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:08,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:08,390 INFO L410 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash -974637268, now seen corresponding path program 1 times [2019-11-07 01:15:08,391 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:08,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878044212] [2019-11-07 01:15:08,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:08,542 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-07 01:15:08,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878044212] [2019-11-07 01:15:08,542 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:15:08,543 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:15:08,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366049901] [2019-11-07 01:15:08,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:15:08,544 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:15:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:15:08,544 INFO L87 Difference]: Start difference. First operand 6665 states and 8119 transitions. Second operand 6 states. [2019-11-07 01:15:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:09,034 INFO L93 Difference]: Finished difference Result 12345 states and 15482 transitions. [2019-11-07 01:15:09,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 01:15:09,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 211 [2019-11-07 01:15:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:09,068 INFO L225 Difference]: With dead ends: 12345 [2019-11-07 01:15:09,068 INFO L226 Difference]: Without dead ends: 5701 [2019-11-07 01:15:09,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:15:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2019-11-07 01:15:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 5701. [2019-11-07 01:15:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5701 states. [2019-11-07 01:15:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 6802 transitions. [2019-11-07 01:15:09,543 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 6802 transitions. Word has length 211 [2019-11-07 01:15:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:09,544 INFO L462 AbstractCegarLoop]: Abstraction has 5701 states and 6802 transitions. [2019-11-07 01:15:09,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:15:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 6802 transitions. [2019-11-07 01:15:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-11-07 01:15:09,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:09,552 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:09,552 INFO L410 AbstractCegarLoop]: === Iteration 21 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash -865994635, now seen corresponding path program 1 times [2019-11-07 01:15:09,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:09,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078713166] [2019-11-07 01:15:09,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-07 01:15:09,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078713166] [2019-11-07 01:15:09,638 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507452176] [2019-11-07 01:15:09,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:10,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:15:10,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:15:10,115 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-07 01:15:10,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:10,267 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 4 [2019-11-07 01:15:10,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680320878] [2019-11-07 01:15:10,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:15:10,268 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:10,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:15:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:15:10,269 INFO L87 Difference]: Start difference. First operand 5701 states and 6802 transitions. Second operand 3 states. [2019-11-07 01:15:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:10,505 INFO L93 Difference]: Finished difference Result 9544 states and 11820 transitions. [2019-11-07 01:15:10,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:15:10,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2019-11-07 01:15:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:10,525 INFO L225 Difference]: With dead ends: 9544 [2019-11-07 01:15:10,525 INFO L226 Difference]: Without dead ends: 5677 [2019-11-07 01:15:10,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:15:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2019-11-07 01:15:10,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 5675. [2019-11-07 01:15:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5675 states. [2019-11-07 01:15:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5675 states to 5675 states and 6664 transitions. [2019-11-07 01:15:10,932 INFO L78 Accepts]: Start accepts. Automaton has 5675 states and 6664 transitions. Word has length 211 [2019-11-07 01:15:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:10,933 INFO L462 AbstractCegarLoop]: Abstraction has 5675 states and 6664 transitions. [2019-11-07 01:15:10,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:15:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5675 states and 6664 transitions. [2019-11-07 01:15:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-11-07 01:15:10,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:10,940 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:11,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:11,144 INFO L410 AbstractCegarLoop]: === Iteration 22 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2146588841, now seen corresponding path program 1 times [2019-11-07 01:15:11,145 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:11,145 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383279014] [2019-11-07 01:15:11,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-07 01:15:11,213 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383279014] [2019-11-07 01:15:11,214 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096304007] [2019-11-07 01:15:11,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:11,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:15:11,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:15:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:15:11,690 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:15:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-07 01:15:11,838 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:15:11,838 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 4 [2019-11-07 01:15:11,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062295304] [2019-11-07 01:15:11,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:15:11,839 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:15:11,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:15:11,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:15:11,840 INFO L87 Difference]: Start difference. First operand 5675 states and 6664 transitions. Second operand 3 states. [2019-11-07 01:15:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:15:12,316 INFO L93 Difference]: Finished difference Result 15902 states and 19722 transitions. [2019-11-07 01:15:12,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:15:12,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 212 [2019-11-07 01:15:12,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:15:12,357 INFO L225 Difference]: With dead ends: 15902 [2019-11-07 01:15:12,357 INFO L226 Difference]: Without dead ends: 10249 [2019-11-07 01:15:12,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:15:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2019-11-07 01:15:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 10246. [2019-11-07 01:15:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10246 states. [2019-11-07 01:15:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10246 states to 10246 states and 12529 transitions. [2019-11-07 01:15:13,783 INFO L78 Accepts]: Start accepts. Automaton has 10246 states and 12529 transitions. Word has length 212 [2019-11-07 01:15:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:15:13,783 INFO L462 AbstractCegarLoop]: Abstraction has 10246 states and 12529 transitions. [2019-11-07 01:15:13,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:15:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10246 states and 12529 transitions. [2019-11-07 01:15:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-07 01:15:13,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:15:13,792 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:15:13,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:15:13,993 INFO L410 AbstractCegarLoop]: === Iteration 23 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:15:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:15:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash 547975687, now seen corresponding path program 1 times [2019-11-07 01:15:13,993 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:15:13,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164013642] [2019-11-07 01:15:13,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:15:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:15:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-07 01:15:14,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164013642] [2019-11-07 01:15:14,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011269035] [2019-11-07 01:15:14,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true