/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:48:10,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:48:10,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:48:10,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:48:10,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:48:10,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:48:10,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:48:10,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:48:10,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:48:10,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:48:10,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:48:10,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:48:10,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:48:10,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:48:10,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:48:10,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:48:10,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:48:10,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:48:10,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:48:10,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:48:10,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:48:10,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:48:10,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:48:10,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:48:10,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 14:48:10,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 14:48:10,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 14:48:10,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 14:48:10,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 14:48:10,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 14:48:10,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 14:48:10,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 14:48:10,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 14:48:10,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 14:48:10,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 14:48:10,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 14:48:10,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 14:48:10,765 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 14:48:10,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:48:10,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:48:10,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:48:10,774 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 14:48:10,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:48:10,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:48:10,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:48:10,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:48:10,836 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:48:10,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:48:10,837 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:48:10,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:48:10,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:48:10,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:48:10,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:48:10,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:48:10,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:48:10,838 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:48:10,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:48:10,839 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:48:10,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:48:10,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:48:10,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:48:10,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:48:10,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:48:10,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:48:10,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:48:10,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:48:10,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:48:10,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:48:10,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:48:10,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:48:10,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:48:10,842 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:48:11,314 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:48:11,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:48:11,365 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:48:11,369 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:48:11,370 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:48:11,372 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 14:48:11,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6b4f54a/8c66a5e25e444e7a915d0cbcadce3ae8/FLAG48e753172 [2020-07-20 14:48:12,544 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:48:12,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 14:48:12,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6b4f54a/8c66a5e25e444e7a915d0cbcadce3ae8/FLAG48e753172 [2020-07-20 14:48:12,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff6b4f54a/8c66a5e25e444e7a915d0cbcadce3ae8 [2020-07-20 14:48:12,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:48:12,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:48:12,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:48:12,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:48:12,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:48:12,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:48:12" (1/1) ... [2020-07-20 14:48:12,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2954c7b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:12, skipping insertion in model container [2020-07-20 14:48:12,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:48:12" (1/1) ... [2020-07-20 14:48:12,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:48:12,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:48:13,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:48:13,536 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:48:13,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:48:13,716 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:48:13,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13 WrapperNode [2020-07-20 14:48:13,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:48:13,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:48:13,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:48:13,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:48:13,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (1/1) ... [2020-07-20 14:48:13,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (1/1) ... [2020-07-20 14:48:13,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (1/1) ... [2020-07-20 14:48:13,777 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (1/1) ... [2020-07-20 14:48:13,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (1/1) ... [2020-07-20 14:48:13,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (1/1) ... [2020-07-20 14:48:13,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (1/1) ... [2020-07-20 14:48:13,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:48:13,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:48:13,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:48:13,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:48:13,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (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 14:48:14,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:48:14,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:48:14,016 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:48:14,017 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-07-20 14:48:14,018 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-07-20 14:48:14,018 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-07-20 14:48:14,018 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-07-20 14:48:14,018 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-07-20 14:48:14,019 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-07-20 14:48:14,019 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-07-20 14:48:14,019 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-07-20 14:48:14,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:48:14,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:48:14,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:48:14,020 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:48:14,020 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:48:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-07-20 14:48:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 14:48:14,021 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 14:48:14,022 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-07-20 14:48:14,022 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-07-20 14:48:14,022 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-07-20 14:48:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-07-20 14:48:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 14:48:14,023 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-07-20 14:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-07-20 14:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 14:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 14:48:14,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 14:48:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 14:48:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 14:48:14,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 14:48:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 14:48:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 14:48:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 14:48:14,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:48:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 14:48:14,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:48:15,812 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:48:15,813 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-20 14:48:15,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:48:15 BoogieIcfgContainer [2020-07-20 14:48:15,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:48:15,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:48:15,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:48:15,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:48:15,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:48:12" (1/3) ... [2020-07-20 14:48:15,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fa32ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:48:15, skipping insertion in model container [2020-07-20 14:48:15,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:48:13" (2/3) ... [2020-07-20 14:48:15,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fa32ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:48:15, skipping insertion in model container [2020-07-20 14:48:15,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:48:15" (3/3) ... [2020-07-20 14:48:15,840 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_3.c [2020-07-20 14:48:15,860 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:48:15,876 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:48:15,904 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:48:15,956 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:48:15,956 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:48:15,957 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:48:15,957 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:48:15,957 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:48:15,958 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:48:15,958 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:48:15,958 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:48:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-07-20 14:48:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 14:48:16,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:48:16,030 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] [2020-07-20 14:48:16,030 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:48:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:48:16,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-07-20 14:48:16,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:48:16,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011450232] [2020-07-20 14:48:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:48:16,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:48:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:48:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:48:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:48:16,919 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 14:48:16,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:48:16,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011450232] [2020-07-20 14:48:16,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:48:16,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:48:16,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430553324] [2020-07-20 14:48:16,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:48:16,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:48:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:48:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:48:16,969 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 3 states. [2020-07-20 14:48:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:48:17,145 INFO L93 Difference]: Finished difference Result 262 states and 403 transitions. [2020-07-20 14:48:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:48:17,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-07-20 14:48:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:48:17,179 INFO L225 Difference]: With dead ends: 262 [2020-07-20 14:48:17,179 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 14:48:17,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 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 14:48:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 14:48:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2020-07-20 14:48:17,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 14:48:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-07-20 14:48:17,305 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-07-20 14:48:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:48:17,307 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-07-20 14:48:17,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:48:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-07-20 14:48:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 14:48:17,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:48:17,315 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] [2020-07-20 14:48:17,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:48:17,530 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:48:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:48:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-07-20 14:48:17,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:48:17,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489392095] [2020-07-20 14:48:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:48:17,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:48:17,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:48:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:48:17,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:48:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:48:17,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:48:17,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489392095] [2020-07-20 14:48:17,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:48:17,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:48:17,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938115886] [2020-07-20 14:48:17,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:48:17,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:48:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:48:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:48:17,880 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 3 states. [2020-07-20 14:48:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:48:17,935 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2020-07-20 14:48:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:48:17,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-20 14:48:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:48:17,940 INFO L225 Difference]: With dead ends: 170 [2020-07-20 14:48:17,940 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 14:48:17,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 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 14:48:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 14:48:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-07-20 14:48:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 14:48:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2020-07-20 14:48:17,968 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 41 [2020-07-20 14:48:17,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:48:17,969 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2020-07-20 14:48:17,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:48:17,969 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2020-07-20 14:48:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 14:48:17,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:48:17,974 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] [2020-07-20 14:48:18,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:48:18,189 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:48:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:48:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash -469545370, now seen corresponding path program 1 times [2020-07-20 14:48:18,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:48:18,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184087290] [2020-07-20 14:48:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:48:18,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:48:18,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:48:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:48:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:48:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:48:18,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:48:18,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184087290] [2020-07-20 14:48:18,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:48:18,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:48:18,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434289106] [2020-07-20 14:48:18,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:48:18,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:48:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:48:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:48:18,572 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand 3 states. [2020-07-20 14:48:18,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:48:18,700 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2020-07-20 14:48:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:48:18,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-07-20 14:48:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:48:18,705 INFO L225 Difference]: With dead ends: 180 [2020-07-20 14:48:18,706 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 14:48:18,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 14:48:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 14:48:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2020-07-20 14:48:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 14:48:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-07-20 14:48:18,732 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 42 [2020-07-20 14:48:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:48:18,733 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-07-20 14:48:18,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:48:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-07-20 14:48:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 14:48:18,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:48:18,738 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] [2020-07-20 14:48:18,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:48:18,956 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:48:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:48:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1206740640, now seen corresponding path program 1 times [2020-07-20 14:48:18,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:48:18,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562347438] [2020-07-20 14:48:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:48:19,294 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:48:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:48:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 14:48:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:48:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:48:19,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:48:19,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562347438] [2020-07-20 14:48:19,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:48:19,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 14:48:19,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131941969] [2020-07-20 14:48:19,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 14:48:19,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:48:19,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 14:48:19,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 14:48:19,355 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 4 states. [2020-07-20 14:48:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:48:19,460 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2020-07-20 14:48:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 14:48:19,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-20 14:48:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:48:19,466 INFO L225 Difference]: With dead ends: 161 [2020-07-20 14:48:19,467 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 14:48:19,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:48:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 14:48:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-20 14:48:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 14:48:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-07-20 14:48:19,492 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 47 [2020-07-20 14:48:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:48:19,493 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-07-20 14:48:19,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 14:48:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-07-20 14:48:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 14:48:19,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:48:19,498 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:48:19,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:48:19,713 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:48:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:48:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash -367196113, now seen corresponding path program 1 times [2020-07-20 14:48:19,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:48:19,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831026897] [2020-07-20 14:48:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:48:20,056 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:48:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:48:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 14:48:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:48:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:48:20,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:48:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:48:20,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831026897] [2020-07-20 14:48:20,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:48:20,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 14:48:20,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165862194] [2020-07-20 14:48:20,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 14:48:20,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:48:20,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 14:48:20,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:48:20,393 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 9 states. [2020-07-20 14:48:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:48:20,825 INFO L93 Difference]: Finished difference Result 176 states and 231 transitions. [2020-07-20 14:48:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 14:48:20,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-07-20 14:48:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:48:20,828 INFO L225 Difference]: With dead ends: 176 [2020-07-20 14:48:20,829 INFO L226 Difference]: Without dead ends: 142 [2020-07-20 14:48:20,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-07-20 14:48:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-20 14:48:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-07-20 14:48:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 14:48:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-20 14:48:20,848 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 53 [2020-07-20 14:48:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:48:20,849 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-20 14:48:20,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 14:48:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-20 14:48:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 14:48:20,852 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:48:20,853 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:48:21,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:48:21,068 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:48:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:48:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash -119201668, now seen corresponding path program 1 times [2020-07-20 14:48:21,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:48:21,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160390105] [2020-07-20 14:48:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:48:21,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:48:21,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:48:21,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:48:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:48:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 14:48:21,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:48:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 14:48:21,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160390105] [2020-07-20 14:48:21,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:48:21,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 14:48:21,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108087590] [2020-07-20 14:48:21,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:48:21,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:48:21,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:48:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:48:21,688 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand 6 states. [2020-07-20 14:48:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:48:22,054 INFO L93 Difference]: Finished difference Result 350 states and 496 transitions. [2020-07-20 14:48:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:48:22,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-07-20 14:48:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:48:22,060 INFO L225 Difference]: With dead ends: 350 [2020-07-20 14:48:22,060 INFO L226 Difference]: Without dead ends: 224 [2020-07-20 14:48:22,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:48:22,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-20 14:48:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2020-07-20 14:48:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 14:48:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2020-07-20 14:48:22,087 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 55 [2020-07-20 14:48:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:48:22,088 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2020-07-20 14:48:22,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:48:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2020-07-20 14:48:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 14:48:22,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:48:22,091 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:48:22,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:48:22,307 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:48:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:48:22,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1683290434, now seen corresponding path program 2 times [2020-07-20 14:48:22,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:48:22,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627650765] [2020-07-20 14:48:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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