/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 DAGSIZE --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_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 04:03:05,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 04:03:05,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 04:03:05,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 04:03:05,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 04:03:05,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 04:03:05,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 04:03:05,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 04:03:05,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 04:03:05,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 04:03:05,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 04:03:05,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 04:03:05,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 04:03:05,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 04:03:05,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 04:03:05,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 04:03:05,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 04:03:05,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 04:03:05,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 04:03:05,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 04:03:05,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 04:03:05,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 04:03:05,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 04:03:05,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 04:03:05,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 04:03:05,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 04:03:05,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 04:03:05,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 04:03:05,378 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 04:03:05,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 04:03:05,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 04:03:05,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 04:03:05,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 04:03:05,408 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 04:03:05,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 04:03:05,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 04:03:05,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 04:03:05,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 04:03:05,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 04:03:05,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 04:03:05,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 04:03:05,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 04:03:05,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 04:03:05,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 04:03:05,411 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 04:03:05,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 04:03:05,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 04:03:05,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 04:03:05,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 04:03:05,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 04:03:05,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:03:05,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 04:03:05,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 04:03:05,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 04:03:05,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 04:03:05,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 04:03:05,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 04:03:05,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 04:03:05,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 04:03:05,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 04:03:05,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 04:03:05,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 04:03:05,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 04:03:05,722 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 04:03:05,723 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 04:03:05,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85264d02b/48f7caebd72b416ca0fc67371ea00d34/FLAG2593e1501 [2020-07-20 04:03:06,371 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 04:03:06,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 04:03:06,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85264d02b/48f7caebd72b416ca0fc67371ea00d34/FLAG2593e1501 [2020-07-20 04:03:06,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85264d02b/48f7caebd72b416ca0fc67371ea00d34 [2020-07-20 04:03:06,668 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 04:03:06,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 04:03:06,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 04:03:06,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 04:03:06,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 04:03:06,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:03:06" (1/1) ... [2020-07-20 04:03:06,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c380e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:06, skipping insertion in model container [2020-07-20 04:03:06,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:03:06" (1/1) ... [2020-07-20 04:03:06,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 04:03:06,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 04:03:07,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:03:07,165 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 04:03:07,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:03:07,276 INFO L208 MainTranslator]: Completed translation [2020-07-20 04:03:07,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07 WrapperNode [2020-07-20 04:03:07,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 04:03:07,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 04:03:07,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 04:03:07,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 04:03:07,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (1/1) ... [2020-07-20 04:03:07,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (1/1) ... [2020-07-20 04:03:07,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (1/1) ... [2020-07-20 04:03:07,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (1/1) ... [2020-07-20 04:03:07,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (1/1) ... [2020-07-20 04:03:07,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (1/1) ... [2020-07-20 04:03:07,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (1/1) ... [2020-07-20 04:03:07,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 04:03:07,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 04:03:07,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 04:03:07,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 04:03:07,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (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 04:03:07,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 04:03:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 04:03:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 04:03:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-07-20 04:03:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-07-20 04:03:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-07-20 04:03:07,476 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-07-20 04:03:07,476 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-07-20 04:03:07,476 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-07-20 04:03:07,477 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-07-20 04:03:07,477 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-07-20 04:03:07,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 04:03:07,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 04:03:07,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 04:03:07,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 04:03:07,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 04:03:07,479 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-07-20 04:03:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 04:03:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 04:03:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-07-20 04:03:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-07-20 04:03:07,480 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-07-20 04:03:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-07-20 04:03:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 04:03:07,481 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-07-20 04:03:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-07-20 04:03:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 04:03:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 04:03:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 04:03:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 04:03:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 04:03:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 04:03:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 04:03:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 04:03:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 04:03:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 04:03:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 04:03:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 04:03:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 04:03:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 04:03:09,048 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 04:03:09,048 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-20 04:03:09,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:03:09 BoogieIcfgContainer [2020-07-20 04:03:09,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 04:03:09,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 04:03:09,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 04:03:09,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 04:03:09,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:03:06" (1/3) ... [2020-07-20 04:03:09,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2919a46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:03:09, skipping insertion in model container [2020-07-20 04:03:09,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:03:07" (2/3) ... [2020-07-20 04:03:09,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2919a46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:03:09, skipping insertion in model container [2020-07-20 04:03:09,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:03:09" (3/3) ... [2020-07-20 04:03:09,065 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_3.c [2020-07-20 04:03:09,078 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 04:03:09,088 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 04:03:09,103 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 04:03:09,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 04:03:09,137 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 04:03:09,137 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 04:03:09,138 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 04:03:09,138 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 04:03:09,139 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 04:03:09,139 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 04:03:09,139 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 04:03:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-07-20 04:03:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 04:03:09,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:09,189 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 04:03:09,190 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:09,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:09,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-07-20 04:03:09,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:09,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748461147] [2020-07-20 04:03:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:09,710 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 04:03:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:09,835 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 04:03:09,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748461147] [2020-07-20 04:03:09,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:03:09,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:03:09,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910155347] [2020-07-20 04:03:09,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:03:09,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:03:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:03:09,865 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 5 states. [2020-07-20 04:03:10,040 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 04:03:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:11,120 INFO L93 Difference]: Finished difference Result 264 states and 405 transitions. [2020-07-20 04:03:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:03:11,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-07-20 04:03:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:11,138 INFO L225 Difference]: With dead ends: 264 [2020-07-20 04:03:11,138 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 04:03:11,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:03:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 04:03:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2020-07-20 04:03:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 04:03:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-07-20 04:03:11,242 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-07-20 04:03:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:11,243 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-07-20 04:03:11,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:03:11,244 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-07-20 04:03:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 04:03:11,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:11,255 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 04:03:11,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 04:03:11,256 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-07-20 04:03:11,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:11,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415785401] [2020-07-20 04:03:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:11,590 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 04:03:11,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415785401] [2020-07-20 04:03:11,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58352296] [2020-07-20 04:03:11,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f42bf99 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:11,785 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3f42bf99 issued 2 check-sat command(s) [2020-07-20 04:03:11,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:03:11,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 04:03:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:03:11,833 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 04:03:11,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:03:11,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 04:03:11,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059795916] [2020-07-20 04:03:11,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 04:03:11,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 04:03:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 04:03:11,837 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 3 states. [2020-07-20 04:03:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:11,868 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2020-07-20 04:03:11,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 04:03:11,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-20 04:03:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:11,872 INFO L225 Difference]: With dead ends: 170 [2020-07-20 04:03:11,872 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 04:03:11,874 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 04:03:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 04:03:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-07-20 04:03:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 04:03:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2020-07-20 04:03:11,903 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 41 [2020-07-20 04:03:11,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:11,903 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2020-07-20 04:03:11,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 04:03:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2020-07-20 04:03:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 04:03:11,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:11,908 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 04:03:12,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 04:03:12,122 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:12,123 INFO L82 PathProgramCache]: Analyzing trace with hash -469545370, now seen corresponding path program 1 times [2020-07-20 04:03:12,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:12,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860898323] [2020-07-20 04:03:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:12,342 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 04:03:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:03:12,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860898323] [2020-07-20 04:03:12,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397535223] [2020-07-20 04:03:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35b42a7d 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 04:03:12,639 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35b42a7d issued 2 check-sat command(s) [2020-07-20 04:03:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:03:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 04:03:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:03:12,674 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 04:03:12,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:03:12,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 04:03:12,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155411442] [2020-07-20 04:03:12,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 04:03:12,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:12,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 04:03:12,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 04:03:12,678 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand 3 states. [2020-07-20 04:03:12,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:12,722 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2020-07-20 04:03:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 04:03:12,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-07-20 04:03:12,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:12,726 INFO L225 Difference]: With dead ends: 180 [2020-07-20 04:03:12,726 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 04:03:12,727 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 04:03:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 04:03:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2020-07-20 04:03:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 04:03:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-07-20 04:03:12,750 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 42 [2020-07-20 04:03:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:12,750 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-07-20 04:03:12,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 04:03:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-07-20 04:03:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 04:03:12,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:12,752 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 04:03:12,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:12,968 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1206740640, now seen corresponding path program 1 times [2020-07-20 04:03:12,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:12,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660761908] [2020-07-20 04:03:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,205 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 04:03:13,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660761908] [2020-07-20 04:03:13,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680829858] [2020-07-20 04:03:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71d8c1ec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:13,383 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@71d8c1ec issued 2 check-sat command(s) [2020-07-20 04:03:13,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:03:13,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 04:03:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:03:13,419 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 04:03:13,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 04:03:13,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-07-20 04:03:13,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036539645] [2020-07-20 04:03:13,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:03:13,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:13,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:03:13,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 04:03:13,421 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 4 states. [2020-07-20 04:03:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:13,475 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2020-07-20 04:03:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:03:13,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-20 04:03:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:13,478 INFO L225 Difference]: With dead ends: 161 [2020-07-20 04:03:13,479 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 04:03:13,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 04:03:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 04:03:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-20 04:03:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 04:03:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-07-20 04:03:13,503 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 47 [2020-07-20 04:03:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:13,504 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-07-20 04:03:13,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:03:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-07-20 04:03:13,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 04:03:13,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:13,506 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 04:03:13,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:13,721 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash 222099566, now seen corresponding path program 1 times [2020-07-20 04:03:13,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:13,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600777447] [2020-07-20 04:03:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 04:03:13,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600777447] [2020-07-20 04:03:13,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236659347] [2020-07-20 04:03:14,003 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@eaa4121 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 04:03:14,206 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@eaa4121 issued 2 check-sat command(s) [2020-07-20 04:03:14,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:03:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 04:03:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:03:14,278 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 04:03:14,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:03:14,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 04:03:14,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544669052] [2020-07-20 04:03:14,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 04:03:14,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 04:03:14,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 04:03:14,282 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 10 states. [2020-07-20 04:03:14,410 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 04:03:14,897 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 04:03:15,062 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 04:03:15,313 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 04:03:15,480 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 04:03:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:16,570 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2020-07-20 04:03:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 04:03:16,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-07-20 04:03:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:16,581 INFO L225 Difference]: With dead ends: 293 [2020-07-20 04:03:16,581 INFO L226 Difference]: Without dead ends: 181 [2020-07-20 04:03:16,582 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 04:03:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-20 04:03:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 142. [2020-07-20 04:03:16,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 04:03:16,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-20 04:03:16,606 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 51 [2020-07-20 04:03:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:16,606 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-20 04:03:16,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 04:03:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-20 04:03:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 04:03:16,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:16,608 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 04:03:16,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:16,817 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:16,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1250021058, now seen corresponding path program 2 times [2020-07-20 04:03:16,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:16,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163643198] [2020-07-20 04:03:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:17,054 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 04:03:17,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163643198] [2020-07-20 04:03:17,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834087323] [2020-07-20 04:03:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc6bf0d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:17,278 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6dc6bf0d issued 3 check-sat command(s) [2020-07-20 04:03:17,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:03:17,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 04:03:17,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:03:17,344 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 04:03:17,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:03:17,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-07-20 04:03:17,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551365527] [2020-07-20 04:03:17,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 04:03:17,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 04:03:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 04:03:17,347 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand 8 states. [2020-07-20 04:03:17,476 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 04:03:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:20,295 INFO L93 Difference]: Finished difference Result 326 states and 458 transitions. [2020-07-20 04:03:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 04:03:20,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-07-20 04:03:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:20,299 INFO L225 Difference]: With dead ends: 326 [2020-07-20 04:03:20,299 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 04:03:20,300 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 04:03:20,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 04:03:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 144. [2020-07-20 04:03:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 04:03:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2020-07-20 04:03:20,333 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 57 [2020-07-20 04:03:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:20,333 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2020-07-20 04:03:20,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 04:03:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2020-07-20 04:03:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 04:03:20,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:20,335 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:03:20,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 04:03:20,551 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:20,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1340728960, now seen corresponding path program 3 times [2020-07-20 04:03:20,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:20,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183982410] [2020-07-20 04:03:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:20,726 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 04:03:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:03:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 04:03:20,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183982410] [2020-07-20 04:03:20,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187661556] [2020-07-20 04:03:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35989fff 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 04:03:21,172 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35989fff issued 3 check-sat command(s) [2020-07-20 04:03:21,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:03:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 04:03:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:03:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 04:03:21,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:03:21,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-20 04:03:21,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643798823] [2020-07-20 04:03:21,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 04:03:21,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:03:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 04:03:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 04:03:21,212 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand 9 states. [2020-07-20 04:03:21,326 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 04:03:23,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:03:23,028 INFO L93 Difference]: Finished difference Result 347 states and 491 transitions. [2020-07-20 04:03:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:03:23,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-07-20 04:03:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:03:23,034 INFO L225 Difference]: With dead ends: 347 [2020-07-20 04:03:23,034 INFO L226 Difference]: Without dead ends: 223 [2020-07-20 04:03:23,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 04:03:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-20 04:03:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 146. [2020-07-20 04:03:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 04:03:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2020-07-20 04:03:23,056 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 59 [2020-07-20 04:03:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:03:23,056 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2020-07-20 04:03:23,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 04:03:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2020-07-20 04:03:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 04:03:23,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:03:23,058 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 04:03:23,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:03:23,274 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:03:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:03:23,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1683290434, now seen corresponding path program 4 times [2020-07-20 04:03:23,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:03:23,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447888261] [2020-07-20 04:03:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b27930 [2020-07-20 04:03:23,316 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 04:03:23,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203228126] [2020-07-20 04:03:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@117b816d 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