/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:26:28,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:26:28,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:26:28,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:26:28,564 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:26:28,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:26:28,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:26:28,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:26:28,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:26:28,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:26:28,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:26:28,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:26:28,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:26:28,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:26:28,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:26:28,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:26:28,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:26:28,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:26:28,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:26:28,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:26:28,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:26:28,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:26:28,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:26:28,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:26:28,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 12:26:28,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 12:26:28,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 12:26:28,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 12:26:28,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 12:26:28,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 12:26:28,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 12:26:28,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 12:26:28,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 12:26:28,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 12:26:28,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 12:26:28,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 12:26:28,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 12:26:28,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 12:26:28,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:26:28,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:26:28,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:26:28,605 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 [2020-07-20 12:26:28,618 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:26:28,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:26:28,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:26:28,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:26:28,620 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:26:28,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:26:28,620 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:26:28,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:26:28,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:26:28,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:26:28,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:26:28,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:26:28,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:26:28,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:26:28,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:26:28,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:26:28,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:26:28,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:26:28,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:26:28,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:26:28,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:26:28,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:26:28,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:26:28,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:26:28,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:26:28,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:26:28,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:28,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:26:28,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:26:28,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:26:28,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:26:28,909 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:26:28,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:26:28,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:26:28,915 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:26:28,916 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-20 12:26:28,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c47b949e/37971b088739467ca816f163f9371ffa/FLAG8a6600ac3 [2020-07-20 12:26:29,496 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:26:29,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.15.cil.c [2020-07-20 12:26:29,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c47b949e/37971b088739467ca816f163f9371ffa/FLAG8a6600ac3 [2020-07-20 12:26:29,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c47b949e/37971b088739467ca816f163f9371ffa [2020-07-20 12:26:29,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:26:29,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:26:29,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:26:29,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:26:29,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:26:29,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:26:29" (1/1) ... [2020-07-20 12:26:29,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2577ae41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:29, skipping insertion in model container [2020-07-20 12:26:29,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:26:29" (1/1) ... [2020-07-20 12:26:29,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:26:29,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:26:30,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:26:30,240 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:26:30,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:26:30,471 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:26:30,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30 WrapperNode [2020-07-20 12:26:30,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:26:30,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:26:30,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:26:30,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:26:30,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (1/1) ... [2020-07-20 12:26:30,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (1/1) ... [2020-07-20 12:26:30,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (1/1) ... [2020-07-20 12:26:30,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (1/1) ... [2020-07-20 12:26:30,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (1/1) ... [2020-07-20 12:26:30,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (1/1) ... [2020-07-20 12:26:30,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (1/1) ... [2020-07-20 12:26:30,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:26:30,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:26:30,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:26:30,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:26:30,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (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 [2020-07-20 12:26:30,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:26:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:26:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-20 12:26:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-20 12:26:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-20 12:26:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-20 12:26:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-20 12:26:30,625 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-20 12:26:30,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-20 12:26:30,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-20 12:26:30,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-20 12:26:30,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-20 12:26:30,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-20 12:26:30,626 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-20 12:26:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-20 12:26:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-20 12:26:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-20 12:26:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-20 12:26:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-20 12:26:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-20 12:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-20 12:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-20 12:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-20 12:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-20 12:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-20 12:26:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-20 12:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-20 12:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-20 12:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-20 12:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-20 12:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-20 12:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-20 12:26:30,629 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-20 12:26:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-20 12:26:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-20 12:26:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-20 12:26:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-20 12:26:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-20 12:26:30,630 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-20 12:26:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-20 12:26:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-20 12:26:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-20 12:26:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-20 12:26:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-20 12:26:30,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:26:30,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:26:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:26:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-20 12:26:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-20 12:26:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-20 12:26:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-20 12:26:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-20 12:26:30,632 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-20 12:26:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-20 12:26:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-20 12:26:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-20 12:26:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-20 12:26:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-20 12:26:30,633 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-20 12:26:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-20 12:26:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-20 12:26:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-20 12:26:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-20 12:26:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-20 12:26:30,634 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-20 12:26:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-20 12:26:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-20 12:26:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-20 12:26:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-20 12:26:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-20 12:26:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-20 12:26:30,635 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-20 12:26:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-20 12:26:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-20 12:26:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-20 12:26:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-20 12:26:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-20 12:26:30,636 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-20 12:26:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-20 12:26:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-20 12:26:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-20 12:26:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-20 12:26:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-20 12:26:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-20 12:26:30,637 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-20 12:26:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-20 12:26:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-20 12:26:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-20 12:26:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-20 12:26:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:26:30,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:26:30,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:26:31,732 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:26:31,733 INFO L295 CfgBuilder]: Removed 17 assume(true) statements. [2020-07-20 12:26:31,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:26:31 BoogieIcfgContainer [2020-07-20 12:26:31,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:26:31,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:26:31,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:26:31,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:26:31,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:26:29" (1/3) ... [2020-07-20 12:26:31,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4080e671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:26:31, skipping insertion in model container [2020-07-20 12:26:31,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:26:30" (2/3) ... [2020-07-20 12:26:31,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4080e671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:26:31, skipping insertion in model container [2020-07-20 12:26:31,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:26:31" (3/3) ... [2020-07-20 12:26:31,749 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.15.cil.c [2020-07-20 12:26:31,760 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:26:31,768 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:26:31,783 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:26:31,810 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:26:31,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:26:31,811 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:26:31,811 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:26:31,811 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:26:31,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:26:31,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:26:31,812 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:26:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states. [2020-07-20 12:26:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-20 12:26:31,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:31,883 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:31,883 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash 754746292, now seen corresponding path program 1 times [2020-07-20 12:26:31,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:31,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512508635] [2020-07-20 12:26:31,903 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:26:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:32,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:32,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512508635] [2020-07-20 12:26:32,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:32,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:32,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093561075] [2020-07-20 12:26:32,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:32,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:32,621 INFO L87 Difference]: Start difference. First operand 499 states. Second operand 3 states. [2020-07-20 12:26:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:32,718 INFO L93 Difference]: Finished difference Result 981 states and 1523 transitions. [2020-07-20 12:26:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:32,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-20 12:26:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:32,740 INFO L225 Difference]: With dead ends: 981 [2020-07-20 12:26:32,741 INFO L226 Difference]: Without dead ends: 490 [2020-07-20 12:26:32,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-20 12:26:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-20 12:26:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-20 12:26:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 718 transitions. [2020-07-20 12:26:32,855 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 718 transitions. Word has length 240 [2020-07-20 12:26:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:32,861 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 718 transitions. [2020-07-20 12:26:32,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 718 transitions. [2020-07-20 12:26:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-20 12:26:32,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:32,869 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:33,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:33,087 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash -332213258, now seen corresponding path program 1 times [2020-07-20 12:26:33,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:33,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284670937] [2020-07-20 12:26:33,090 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:33,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:26:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:33,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:33,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284670937] [2020-07-20 12:26:33,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:33,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:33,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238409997] [2020-07-20 12:26:33,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:33,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:33,592 INFO L87 Difference]: Start difference. First operand 490 states and 718 transitions. Second operand 3 states. [2020-07-20 12:26:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:33,680 INFO L93 Difference]: Finished difference Result 957 states and 1404 transitions. [2020-07-20 12:26:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:33,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-20 12:26:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:33,691 INFO L225 Difference]: With dead ends: 957 [2020-07-20 12:26:33,692 INFO L226 Difference]: Without dead ends: 490 [2020-07-20 12:26:33,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-20 12:26:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2020-07-20 12:26:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-07-20 12:26:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 717 transitions. [2020-07-20 12:26:33,766 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 717 transitions. Word has length 240 [2020-07-20 12:26:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:33,766 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 717 transitions. [2020-07-20 12:26:33,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 717 transitions. [2020-07-20 12:26:33,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-20 12:26:33,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:33,772 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:33,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:33,987 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:33,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:33,988 INFO L82 PathProgramCache]: Analyzing trace with hash -275347912, now seen corresponding path program 1 times [2020-07-20 12:26:33,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:33,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060902830] [2020-07-20 12:26:33,989 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:26:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:34,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:34,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060902830] [2020-07-20 12:26:34,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:34,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:34,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380665133] [2020-07-20 12:26:34,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:34,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:34,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:34,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:34,381 INFO L87 Difference]: Start difference. First operand 490 states and 717 transitions. Second operand 3 states. [2020-07-20 12:26:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:34,464 INFO L93 Difference]: Finished difference Result 1382 states and 2054 transitions. [2020-07-20 12:26:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:34,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 240 [2020-07-20 12:26:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:34,472 INFO L225 Difference]: With dead ends: 1382 [2020-07-20 12:26:34,472 INFO L226 Difference]: Without dead ends: 925 [2020-07-20 12:26:34,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-07-20 12:26:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 919. [2020-07-20 12:26:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 919 states. [2020-07-20 12:26:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1373 transitions. [2020-07-20 12:26:34,525 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1373 transitions. Word has length 240 [2020-07-20 12:26:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:34,526 INFO L479 AbstractCegarLoop]: Abstraction has 919 states and 1373 transitions. [2020-07-20 12:26:34,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1373 transitions. [2020-07-20 12:26:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:34,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:34,530 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:34,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:34,734 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:34,735 INFO L82 PathProgramCache]: Analyzing trace with hash -210493631, now seen corresponding path program 1 times [2020-07-20 12:26:34,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:34,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943511903] [2020-07-20 12:26:34,737 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:35,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:35,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:35,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:35,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943511903] [2020-07-20 12:26:35,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:35,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:35,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250396747] [2020-07-20 12:26:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:35,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:35,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:35,149 INFO L87 Difference]: Start difference. First operand 919 states and 1373 transitions. Second operand 3 states. [2020-07-20 12:26:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:35,308 INFO L93 Difference]: Finished difference Result 2680 states and 4099 transitions. [2020-07-20 12:26:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:35,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:26:35,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:35,324 INFO L225 Difference]: With dead ends: 2680 [2020-07-20 12:26:35,324 INFO L226 Difference]: Without dead ends: 1793 [2020-07-20 12:26:35,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2020-07-20 12:26:35,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1786. [2020-07-20 12:26:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1786 states. [2020-07-20 12:26:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2675 transitions. [2020-07-20 12:26:35,457 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2675 transitions. Word has length 241 [2020-07-20 12:26:35,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:35,459 INFO L479 AbstractCegarLoop]: Abstraction has 1786 states and 2675 transitions. [2020-07-20 12:26:35,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:35,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2675 transitions. [2020-07-20 12:26:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:35,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:35,463 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:35,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:35,676 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1455894560, now seen corresponding path program 1 times [2020-07-20 12:26:35,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:35,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617735167] [2020-07-20 12:26:35,677 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:35,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 2105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:36,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:36,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617735167] [2020-07-20 12:26:36,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:36,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:36,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256750682] [2020-07-20 12:26:36,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:36,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:36,092 INFO L87 Difference]: Start difference. First operand 1786 states and 2675 transitions. Second operand 3 states. [2020-07-20 12:26:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:36,248 INFO L93 Difference]: Finished difference Result 5269 states and 8082 transitions. [2020-07-20 12:26:36,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:36,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:26:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:36,270 INFO L225 Difference]: With dead ends: 5269 [2020-07-20 12:26:36,270 INFO L226 Difference]: Without dead ends: 3515 [2020-07-20 12:26:36,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:36,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2020-07-20 12:26:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3504. [2020-07-20 12:26:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3504 states. [2020-07-20 12:26:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 5263 transitions. [2020-07-20 12:26:36,446 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 5263 transitions. Word has length 241 [2020-07-20 12:26:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:36,446 INFO L479 AbstractCegarLoop]: Abstraction has 3504 states and 5263 transitions. [2020-07-20 12:26:36,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 5263 transitions. [2020-07-20 12:26:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:36,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:36,450 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:36,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:36,664 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:36,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:36,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1836447041, now seen corresponding path program 1 times [2020-07-20 12:26:36,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:36,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551355252] [2020-07-20 12:26:36,665 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:36,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 2102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:37,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:37,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551355252] [2020-07-20 12:26:37,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:37,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:37,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424706282] [2020-07-20 12:26:37,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:37,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:37,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:37,043 INFO L87 Difference]: Start difference. First operand 3504 states and 5263 transitions. Second operand 3 states. [2020-07-20 12:26:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:37,270 INFO L93 Difference]: Finished difference Result 10399 states and 16010 transitions. [2020-07-20 12:26:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:37,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:26:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:37,316 INFO L225 Difference]: With dead ends: 10399 [2020-07-20 12:26:37,317 INFO L226 Difference]: Without dead ends: 6927 [2020-07-20 12:26:37,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2020-07-20 12:26:37,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6908. [2020-07-20 12:26:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6908 states. [2020-07-20 12:26:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6908 states to 6908 states and 10415 transitions. [2020-07-20 12:26:37,734 INFO L78 Accepts]: Start accepts. Automaton has 6908 states and 10415 transitions. Word has length 241 [2020-07-20 12:26:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:37,734 INFO L479 AbstractCegarLoop]: Abstraction has 6908 states and 10415 transitions. [2020-07-20 12:26:37,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6908 states and 10415 transitions. [2020-07-20 12:26:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:37,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:37,738 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:37,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:37,954 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:37,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:37,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1563451618, now seen corresponding path program 1 times [2020-07-20 12:26:37,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:37,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119808138] [2020-07-20 12:26:37,955 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:38,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2099 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:38,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:38,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119808138] [2020-07-20 12:26:38,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:38,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:38,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499506794] [2020-07-20 12:26:38,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:38,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:38,313 INFO L87 Difference]: Start difference. First operand 6908 states and 10415 transitions. Second operand 3 states. [2020-07-20 12:26:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:38,715 INFO L93 Difference]: Finished difference Result 20563 states and 31830 transitions. [2020-07-20 12:26:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:38,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:26:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:38,797 INFO L225 Difference]: With dead ends: 20563 [2020-07-20 12:26:38,798 INFO L226 Difference]: Without dead ends: 13687 [2020-07-20 12:26:38,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2020-07-20 12:26:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 13652. [2020-07-20 12:26:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13652 states. [2020-07-20 12:26:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13652 states to 13652 states and 20695 transitions. [2020-07-20 12:26:39,579 INFO L78 Accepts]: Start accepts. Automaton has 13652 states and 20695 transitions. Word has length 241 [2020-07-20 12:26:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:39,580 INFO L479 AbstractCegarLoop]: Abstraction has 13652 states and 20695 transitions. [2020-07-20 12:26:39,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states and 20695 transitions. [2020-07-20 12:26:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:39,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:39,583 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:39,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:39,799 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:39,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1484333763, now seen corresponding path program 1 times [2020-07-20 12:26:39,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:39,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009293553] [2020-07-20 12:26:39,801 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:40,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:40,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:40,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:40,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009293553] [2020-07-20 12:26:40,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:40,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:40,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601774261] [2020-07-20 12:26:40,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:40,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:40,147 INFO L87 Difference]: Start difference. First operand 13652 states and 20695 transitions. Second operand 3 states. [2020-07-20 12:26:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:41,224 INFO L93 Difference]: Finished difference Result 40699 states and 63518 transitions. [2020-07-20 12:26:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:41,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:26:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:41,388 INFO L225 Difference]: With dead ends: 40699 [2020-07-20 12:26:41,389 INFO L226 Difference]: Without dead ends: 27079 [2020-07-20 12:26:41,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27079 states. [2020-07-20 12:26:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27079 to 27012. [2020-07-20 12:26:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27012 states. [2020-07-20 12:26:43,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 41279 transitions. [2020-07-20 12:26:43,385 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 41279 transitions. Word has length 241 [2020-07-20 12:26:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:43,386 INFO L479 AbstractCegarLoop]: Abstraction has 27012 states and 41279 transitions. [2020-07-20 12:26:43,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 41279 transitions. [2020-07-20 12:26:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:43,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:43,389 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:43,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:43,604 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446910, now seen corresponding path program 1 times [2020-07-20 12:26:43,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:43,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536784152] [2020-07-20 12:26:43,606 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2093 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:43,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:44,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:44,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536784152] [2020-07-20 12:26:44,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:44,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:44,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142228762] [2020-07-20 12:26:44,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:44,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:44,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:44,083 INFO L87 Difference]: Start difference. First operand 27012 states and 41279 transitions. Second operand 3 states. [2020-07-20 12:26:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:45,449 INFO L93 Difference]: Finished difference Result 80587 states and 127350 transitions. [2020-07-20 12:26:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:45,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:26:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:45,678 INFO L225 Difference]: With dead ends: 80587 [2020-07-20 12:26:45,678 INFO L226 Difference]: Without dead ends: 53607 [2020-07-20 12:26:45,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53607 states. [2020-07-20 12:26:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53607 to 53476. [2020-07-20 12:26:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53476 states. [2020-07-20 12:26:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53476 states to 53476 states and 82711 transitions. [2020-07-20 12:26:47,993 INFO L78 Accepts]: Start accepts. Automaton has 53476 states and 82711 transitions. Word has length 241 [2020-07-20 12:26:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:47,993 INFO L479 AbstractCegarLoop]: Abstraction has 53476 states and 82711 transitions. [2020-07-20 12:26:47,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 53476 states and 82711 transitions. [2020-07-20 12:26:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:47,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:47,997 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:48,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:48,212 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -564026113, now seen corresponding path program 1 times [2020-07-20 12:26:48,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:48,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351765307] [2020-07-20 12:26:48,215 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 2090 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:49,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:49,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351765307] [2020-07-20 12:26:49,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:49,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:49,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846121064] [2020-07-20 12:26:49,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:49,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:49,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:49,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:49,985 INFO L87 Difference]: Start difference. First operand 53476 states and 82711 transitions. Second operand 3 states. [2020-07-20 12:26:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:26:51,765 INFO L93 Difference]: Finished difference Result 159595 states and 257006 transitions. [2020-07-20 12:26:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:26:51,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:26:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:26:52,579 INFO L225 Difference]: With dead ends: 159595 [2020-07-20 12:26:52,579 INFO L226 Difference]: Without dead ends: 106151 [2020-07-20 12:26:52,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106151 states. [2020-07-20 12:26:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106151 to 105892. [2020-07-20 12:26:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105892 states. [2020-07-20 12:26:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105892 states to 105892 states and 166751 transitions. [2020-07-20 12:26:57,820 INFO L78 Accepts]: Start accepts. Automaton has 105892 states and 166751 transitions. Word has length 241 [2020-07-20 12:26:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:26:57,821 INFO L479 AbstractCegarLoop]: Abstraction has 105892 states and 166751 transitions. [2020-07-20 12:26:57,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:26:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 105892 states and 166751 transitions. [2020-07-20 12:26:57,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:26:57,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:26:57,824 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:26:58,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:58,039 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:26:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:26:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash 13716800, now seen corresponding path program 1 times [2020-07-20 12:26:58,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:26:58,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456745058] [2020-07-20 12:26:58,041 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:26:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:26:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:26:58,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:26:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:26:58,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:26:58,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456745058] [2020-07-20 12:26:58,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:26:58,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:26:58,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889263449] [2020-07-20 12:26:58,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:26:58,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:26:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:26:58,394 INFO L87 Difference]: Start difference. First operand 105892 states and 166751 transitions. Second operand 3 states. [2020-07-20 12:27:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:27:04,309 INFO L93 Difference]: Finished difference Result 316075 states and 523542 transitions. [2020-07-20 12:27:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:27:04,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:27:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:27:05,053 INFO L225 Difference]: With dead ends: 316075 [2020-07-20 12:27:05,054 INFO L226 Difference]: Without dead ends: 210215 [2020-07-20 12:27:09,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:27:09,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210215 states. [2020-07-20 12:27:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210215 to 209700. [2020-07-20 12:27:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209700 states. [2020-07-20 12:27:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209700 states to 209700 states and 339127 transitions. [2020-07-20 12:27:20,563 INFO L78 Accepts]: Start accepts. Automaton has 209700 states and 339127 transitions. Word has length 241 [2020-07-20 12:27:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:27:20,564 INFO L479 AbstractCegarLoop]: Abstraction has 209700 states and 339127 transitions. [2020-07-20 12:27:20,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:27:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 209700 states and 339127 transitions. [2020-07-20 12:27:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:27:20,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:27:20,566 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:27:20,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:27:20,781 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:27:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:27:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash 233424705, now seen corresponding path program 1 times [2020-07-20 12:27:20,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:27:20,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757632954] [2020-07-20 12:27:20,784 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:27:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:27:21,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 12:27:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:27:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:27:21,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:27:21,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757632954] [2020-07-20 12:27:21,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:27:21,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:27:21,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705409993] [2020-07-20 12:27:21,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:27:21,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:27:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:27:21,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:27:21,140 INFO L87 Difference]: Start difference. First operand 209700 states and 339127 transitions. Second operand 3 states. [2020-07-20 12:27:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:27:39,908 INFO L93 Difference]: Finished difference Result 625963 states and 1080782 transitions. [2020-07-20 12:27:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:27:39,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 241 [2020-07-20 12:27:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:27:41,339 INFO L225 Difference]: With dead ends: 625963 [2020-07-20 12:27:41,339 INFO L226 Difference]: Without dead ends: 416295 [2020-07-20 12:27:43,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:27:43,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416295 states. [2020-07-20 12:28:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416295 to 415268. [2020-07-20 12:28:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-20 12:28:19,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 698303 transitions. [2020-07-20 12:28:19,568 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 698303 transitions. Word has length 241 [2020-07-20 12:28:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:28:19,569 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 698303 transitions. [2020-07-20 12:28:19,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:28:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 698303 transitions. [2020-07-20 12:28:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:28:19,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:28:19,570 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:28:19,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:28:19,784 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:28:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:28:19,785 INFO L82 PathProgramCache]: Analyzing trace with hash 805568096, now seen corresponding path program 1 times [2020-07-20 12:28:19,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:28:19,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120422016] [2020-07-20 12:28:19,786 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:28:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:28:20,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:28:20,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:28:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:28:20,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:28:20,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120422016] [2020-07-20 12:28:20,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:28:20,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:28:20,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005919785] [2020-07-20 12:28:20,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:28:20,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:28:20,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:28:20,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:28:20,139 INFO L87 Difference]: Start difference. First operand 415268 states and 698303 transitions. Second operand 5 states. [2020-07-20 12:28:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:28:49,233 INFO L93 Difference]: Finished difference Result 830505 states and 1399635 transitions. [2020-07-20 12:28:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:28:49,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 12:28:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:28:50,693 INFO L225 Difference]: With dead ends: 830505 [2020-07-20 12:28:50,694 INFO L226 Difference]: Without dead ends: 415268 [2020-07-20 12:28:53,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:28:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415268 states. [2020-07-20 12:29:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415268 to 415268. [2020-07-20 12:29:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415268 states. [2020-07-20 12:29:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415268 states to 415268 states and 695231 transitions. [2020-07-20 12:29:21,363 INFO L78 Accepts]: Start accepts. Automaton has 415268 states and 695231 transitions. Word has length 241 [2020-07-20 12:29:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:29:21,364 INFO L479 AbstractCegarLoop]: Abstraction has 415268 states and 695231 transitions. [2020-07-20 12:29:21,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:29:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 415268 states and 695231 transitions. [2020-07-20 12:29:21,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:29:21,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:29:21,365 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:29:21,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:29:21,567 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:29:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:29:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2140674268, now seen corresponding path program 1 times [2020-07-20 12:29:21,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:29:21,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401492963] [2020-07-20 12:29:21,568 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:29:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:29:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:29:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:29:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:29:21,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:29:21,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401492963] [2020-07-20 12:29:21,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:29:21,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:29:21,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385573048] [2020-07-20 12:29:21,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:29:21,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:29:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:29:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:29:21,932 INFO L87 Difference]: Start difference. First operand 415268 states and 695231 transitions. Second operand 5 states. [2020-07-20 12:30:13,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:30:13,479 INFO L93 Difference]: Finished difference Result 938538 states and 1744260 transitions. [2020-07-20 12:30:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:30:13,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2020-07-20 12:30:13,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:30:17,145 INFO L225 Difference]: With dead ends: 938538 [2020-07-20 12:30:17,145 INFO L226 Difference]: Without dead ends: 523301 [2020-07-20 12:30:21,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:30:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523301 states. [2020-07-20 12:31:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523301 to 490020. [2020-07-20 12:31:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490020 states. [2020-07-20 12:31:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490020 states to 490020 states and 783551 transitions. [2020-07-20 12:31:06,010 INFO L78 Accepts]: Start accepts. Automaton has 490020 states and 783551 transitions. Word has length 241 [2020-07-20 12:31:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:31:06,011 INFO L479 AbstractCegarLoop]: Abstraction has 490020 states and 783551 transitions. [2020-07-20 12:31:06,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:31:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 490020 states and 783551 transitions. [2020-07-20 12:31:06,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-07-20 12:31:06,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:31:06,013 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:31:06,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:06,226 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:31:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:31:06,227 INFO L82 PathProgramCache]: Analyzing trace with hash -764543912, now seen corresponding path program 1 times [2020-07-20 12:31:06,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:31:06,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805702986] [2020-07-20 12:31:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:31:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:31:06,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:31:06,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:31:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:31:06,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:31:06,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805702986] [2020-07-20 12:31:06,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:31:06,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:31:06,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930878291] [2020-07-20 12:31:06,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:31:06,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:31:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:31:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:31:06,591 INFO L87 Difference]: Start difference. First operand 490020 states and 783551 transitions. Second operand 5 states.