/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:11:25,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:11:25,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:11:25,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:11:25,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:11:25,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:11:25,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:11:25,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:11:25,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:11:25,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:11:25,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:11:25,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:11:25,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:11:25,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:11:25,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:11:25,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:11:25,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:11:25,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:11:25,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:11:25,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:11:25,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:11:25,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:11:25,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:11:25,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:11:25,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 06:11:25,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 06:11:25,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 06:11:25,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 06:11:25,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 06:11:25,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 06:11:25,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 06:11:25,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 06:11:25,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 06:11:25,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 06:11:25,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 06:11:25,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 06:11:25,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 06:11:25,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 06:11:25,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:11:25,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:11:25,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:11:25,249 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 06:11:25,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:11:25,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:11:25,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:11:25,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:11:25,270 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:11:25,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:11:25,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:11:25,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:11:25,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:11:25,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:11:25,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:11:25,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:11:25,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:11:25,272 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:11:25,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:11:25,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:11:25,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:11:25,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:11:25,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:11:25,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:11:25,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:11:25,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:11:25,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:11:25,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:11:25,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:11:25,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:11:25,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:11:25,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:11:25,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:11:25,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:11:25,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:11:25,573 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:11:25,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:11:25,579 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:11:25,579 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:11:25,580 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-07-20 06:11:25,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e54590b/30eb41686256453a86a5bff069e960a3/FLAG6710dc0c4 [2020-07-20 06:11:26,243 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:11:26,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-07-20 06:11:26,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e54590b/30eb41686256453a86a5bff069e960a3/FLAG6710dc0c4 [2020-07-20 06:11:26,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50e54590b/30eb41686256453a86a5bff069e960a3 [2020-07-20 06:11:26,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:11:26,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:11:26,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:11:26,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:11:26,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:11:26,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:26" (1/1) ... [2020-07-20 06:11:26,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f26671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:26, skipping insertion in model container [2020-07-20 06:11:26,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:26" (1/1) ... [2020-07-20 06:11:26,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:11:26,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:11:27,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:11:27,131 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:11:27,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:11:27,270 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:11:27,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27 WrapperNode [2020-07-20 06:11:27,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:11:27,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:11:27,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:11:27,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:11:27,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:11:27,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:11:27,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:11:27,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:11:27,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (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 06:11:27,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:11:27,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:11:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:11:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-07-20 06:11:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-07-20 06:11:27,465 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-07-20 06:11:27,466 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-07-20 06:11:27,466 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-07-20 06:11:27,466 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-07-20 06:11:27,467 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-07-20 06:11:27,467 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-07-20 06:11:27,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:11:27,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:11:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:11:27,468 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:11:27,469 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:11:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-07-20 06:11:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 06:11:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 06:11:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-07-20 06:11:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-07-20 06:11:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-07-20 06:11:27,470 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-07-20 06:11:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 06:11:27,471 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-07-20 06:11:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-07-20 06:11:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 06:11:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:11:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:11:27,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 06:11:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 06:11:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:11:27,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 06:11:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:11:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:11:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 06:11:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 06:11:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:11:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 06:11:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:11:28,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:11:28,688 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-20 06:11:28,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:28 BoogieIcfgContainer [2020-07-20 06:11:28,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:11:28,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:11:28,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:11:28,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:11:28,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:11:26" (1/3) ... [2020-07-20 06:11:28,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1150c2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:28, skipping insertion in model container [2020-07-20 06:11:28,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27" (2/3) ... [2020-07-20 06:11:28,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1150c2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:28, skipping insertion in model container [2020-07-20 06:11:28,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:28" (3/3) ... [2020-07-20 06:11:28,704 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_2.c [2020-07-20 06:11:28,715 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:11:28,724 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:11:28,736 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:11:28,758 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:11:28,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:11:28,758 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:11:28,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:11:28,759 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:11:28,759 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:11:28,759 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:11:28,759 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:11:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-07-20 06:11:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 06:11:28,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:28,795 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 06:11:28,796 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-07-20 06:11:28,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:28,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828767779] [2020-07-20 06:11:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:29,477 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 06:11:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:29,575 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 06:11:29,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828767779] [2020-07-20 06:11:29,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:11:29,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:11:29,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417480196] [2020-07-20 06:11:29,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:11:29,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:29,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:11:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:11:29,603 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 5 states. [2020-07-20 06:11:29,756 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 06:11:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:32,791 INFO L93 Difference]: Finished difference Result 265 states and 406 transitions. [2020-07-20 06:11:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:11:32,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-07-20 06:11:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:32,810 INFO L225 Difference]: With dead ends: 265 [2020-07-20 06:11:32,810 INFO L226 Difference]: Without dead ends: 141 [2020-07-20 06:11:32,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:11:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-07-20 06:11:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2020-07-20 06:11:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 06:11:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-07-20 06:11:32,898 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-07-20 06:11:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:32,899 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-07-20 06:11:32,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:11:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-07-20 06:11:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 06:11:32,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:32,906 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 06:11:32,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:11:32,907 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:32,907 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-07-20 06:11:32,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:32,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936059059] [2020-07-20 06:11:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:11:33,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936059059] [2020-07-20 06:11:33,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531541927] [2020-07-20 06:11:33,266 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fabfb51 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:33,484 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4fabfb51 issued 2 check-sat command(s) [2020-07-20 06:11:33,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:11:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:33,535 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 06:11:33,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:11:33,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 06:11:33,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518929511] [2020-07-20 06:11:33,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:11:33,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:33,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:11:33,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:11:33,539 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 3 states. [2020-07-20 06:11:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:33,569 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2020-07-20 06:11:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:11:33,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-20 06:11:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:33,572 INFO L225 Difference]: With dead ends: 170 [2020-07-20 06:11:33,572 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 06:11:33,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:11:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 06:11:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-07-20 06:11:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 06:11:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2020-07-20 06:11:33,599 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 41 [2020-07-20 06:11:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:33,600 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2020-07-20 06:11:33,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:11:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2020-07-20 06:11:33,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 06:11:33,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:33,605 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 06:11:33,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:11:33,820 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash -469545370, now seen corresponding path program 1 times [2020-07-20 06:11:33,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:33,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389291234] [2020-07-20 06:11:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,008 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 06:11:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:11:34,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389291234] [2020-07-20 06:11:34,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925939391] [2020-07-20 06:11:34,092 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5900d7bb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:34,255 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5900d7bb issued 2 check-sat command(s) [2020-07-20 06:11:34,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:34,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:11:34,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:34,278 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 06:11:34,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:11:34,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 06:11:34,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654932721] [2020-07-20 06:11:34,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:11:34,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:11:34,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:11:34,281 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand 3 states. [2020-07-20 06:11:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:34,356 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2020-07-20 06:11:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:11:34,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-07-20 06:11:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:34,359 INFO L225 Difference]: With dead ends: 180 [2020-07-20 06:11:34,359 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 06:11:34,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:11:34,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 06:11:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2020-07-20 06:11:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 06:11:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-07-20 06:11:34,392 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 42 [2020-07-20 06:11:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:34,393 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-07-20 06:11:34,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:11:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-07-20 06:11:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 06:11:34,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:34,399 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 06:11:34,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:34,615 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1206740640, now seen corresponding path program 1 times [2020-07-20 06:11:34,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:34,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432319285] [2020-07-20 06:11:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,775 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 06:11:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:11:34,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432319285] [2020-07-20 06:11:34,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019493087] [2020-07-20 06:11:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d9254d4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:35,056 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@d9254d4 issued 2 check-sat command(s) [2020-07-20 06:11:35,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:35,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:11:35,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:35,096 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 06:11:35,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:11:35,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-07-20 06:11:35,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245119736] [2020-07-20 06:11:35,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:11:35,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:35,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:11:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:11:35,101 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 4 states. [2020-07-20 06:11:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:35,154 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2020-07-20 06:11:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:11:35,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-20 06:11:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:35,157 INFO L225 Difference]: With dead ends: 161 [2020-07-20 06:11:35,157 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 06:11:35,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:11:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 06:11:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-20 06:11:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 06:11:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-07-20 06:11:35,178 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 47 [2020-07-20 06:11:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:35,178 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-07-20 06:11:35,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:11:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-07-20 06:11:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 06:11:35,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:35,180 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:11:35,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:35,394 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash 222099566, now seen corresponding path program 1 times [2020-07-20 06:11:35,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:35,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050232007] [2020-07-20 06:11:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 06:11:35,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050232007] [2020-07-20 06:11:35,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112736199] [2020-07-20 06:11:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2802ec62 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:35,857 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2802ec62 issued 2 check-sat command(s) [2020-07-20 06:11:35,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 06:11:35,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 06:11:35,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:35,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 06:11:35,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805254109] [2020-07-20 06:11:35,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:11:35,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:35,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:11:35,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:11:35,928 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 10 states. [2020-07-20 06:11:36,055 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 06:11:36,490 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 06:11:36,653 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 06:11:36,896 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 06:11:37,053 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 06:11:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:38,095 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2020-07-20 06:11:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:11:38,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-07-20 06:11:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:38,098 INFO L225 Difference]: With dead ends: 293 [2020-07-20 06:11:38,098 INFO L226 Difference]: Without dead ends: 181 [2020-07-20 06:11:38,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:11:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-20 06:11:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 142. [2020-07-20 06:11:38,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 06:11:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-20 06:11:38,119 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 51 [2020-07-20 06:11:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:38,120 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-20 06:11:38,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:11:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-20 06:11:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 06:11:38,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:38,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:11:38,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:38,336 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1250021058, now seen corresponding path program 2 times [2020-07-20 06:11:38,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:38,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564962706] [2020-07-20 06:11:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 06:11:38,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564962706] [2020-07-20 06:11:38,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046120371] [2020-07-20 06:11:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4353d7db No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:38,858 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4353d7db issued 3 check-sat command(s) [2020-07-20 06:11:38,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:11:38,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 06:11:38,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:38,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-07-20 06:11:38,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841960539] [2020-07-20 06:11:38,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:11:38,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:11:38,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:11:38,928 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand 8 states. [2020-07-20 06:11:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:40,329 INFO L93 Difference]: Finished difference Result 326 states and 458 transitions. [2020-07-20 06:11:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:11:40,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-07-20 06:11:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:40,337 INFO L225 Difference]: With dead ends: 326 [2020-07-20 06:11:40,337 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 06:11:40,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:11:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 06:11:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 144. [2020-07-20 06:11:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 06:11:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2020-07-20 06:11:40,359 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 57 [2020-07-20 06:11:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:40,359 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2020-07-20 06:11:40,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:11:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2020-07-20 06:11:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 06:11:40,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:40,361 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:11:40,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 06:11:40,576 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash 993144001, now seen corresponding path program 1 times [2020-07-20 06:11:40,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:40,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610816636] [2020-07-20 06:11:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 06:11:40,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610816636] [2020-07-20 06:11:40,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047661460] [2020-07-20 06:11:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@609ac45b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:41,176 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@609ac45b issued 2 check-sat command(s) [2020-07-20 06:11:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 06:11:41,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 06:11:41,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:41,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 06:11:41,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369459086] [2020-07-20 06:11:41,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:11:41,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:41,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:11:41,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-07-20 06:11:41,336 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand 14 states. [2020-07-20 06:11:41,512 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 06:11:42,226 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 06:11:42,518 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2020-07-20 06:11:43,056 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2020-07-20 06:11:43,326 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 06:11:43,473 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-20 06:11:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:44,783 INFO L93 Difference]: Finished difference Result 349 states and 495 transitions. [2020-07-20 06:11:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 06:11:44,784 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 06:11:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:44,791 INFO L225 Difference]: With dead ends: 349 [2020-07-20 06:11:44,791 INFO L226 Difference]: Without dead ends: 225 [2020-07-20 06:11:44,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-07-20 06:11:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-20 06:11:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 148. [2020-07-20 06:11:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-07-20 06:11:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 196 transitions. [2020-07-20 06:11:44,825 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 196 transitions. Word has length 61 [2020-07-20 06:11:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:44,826 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 196 transitions. [2020-07-20 06:11:44,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:11:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 196 transitions. [2020-07-20 06:11:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 06:11:44,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:44,827 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 06:11:45,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:45,041 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:45,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1683290434, now seen corresponding path program 3 times [2020-07-20 06:11:45,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:45,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500044102] [2020-07-20 06:11:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@13d0b7cd [2020-07-20 06:11:45,078 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:11:45,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832032777] [2020-07-20 06:11:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52867100 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true