/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_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:11:26,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:11:26,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:11:26,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:11:26,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:11:26,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:11:26,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:11:26,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:11:26,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:11:26,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:11:26,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:11:26,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:11:26,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:11:26,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:11:26,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:11:26,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:11:26,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:11:26,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:11:26,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:11:26,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:11:26,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:11:26,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:11:26,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:11:26,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:11:26,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 06:11:26,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 06:11:26,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 06:11:26,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 06:11:26,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 06:11:26,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 06:11:26,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:11:26,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:11:26,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:11:26,642 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 06:11:26,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:11:26,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:11:26,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:11:26,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:11:26,681 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:11:26,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:11:26,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:11:26,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:11:26,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:11:26,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:11:26,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:11:26,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:11:26,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:11:26,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:11:26,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:11:26,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:11:26,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:11:26,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:11:26,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:11:26,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:11:26,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:11:26,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:11:26,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:11:26,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:11:26,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:11:26,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:11:26,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:11:26,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:11:26,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:11:26,689 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 06:11:26,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:11:26,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:11:26,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:11:26,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:11:26,994 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:11:26,995 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 06:11:27,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd0af4873/6f4a800fc79342cb85f151ad406af775/FLAG9a2858d13 [2020-07-20 06:11:27,588 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:11:27,589 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 06:11:27,599 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd0af4873/6f4a800fc79342cb85f151ad406af775/FLAG9a2858d13 [2020-07-20 06:11:27,909 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd0af4873/6f4a800fc79342cb85f151ad406af775 [2020-07-20 06:11:27,919 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:11:27,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:11:27,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:11:27,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:11:27,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:11:27,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4790cb55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:27, skipping insertion in model container [2020-07-20 06:11:27,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:11:27" (1/1) ... [2020-07-20 06:11:27,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:11:28,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:11:28,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:11:28,430 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:11:28,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:11:28,544 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:11:28,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28 WrapperNode [2020-07-20 06:11:28,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:11:28,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:11:28,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:11:28,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:11:28,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (1/1) ... [2020-07-20 06:11:28,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (1/1) ... [2020-07-20 06:11:28,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (1/1) ... [2020-07-20 06:11:28,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (1/1) ... [2020-07-20 06:11:28,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (1/1) ... [2020-07-20 06:11:28,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (1/1) ... [2020-07-20 06:11:28,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (1/1) ... [2020-07-20 06:11:28,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:11:28,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:11:28,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:11:28,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:11:28,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (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 06:11:28,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:11:28,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:11:28,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:11:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-07-20 06:11:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-07-20 06:11:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-07-20 06:11:28,766 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-07-20 06:11:28,767 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-07-20 06:11:28,767 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-07-20 06:11:28,769 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-07-20 06:11:28,769 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-07-20 06:11:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:11:28,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:11:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:11:28,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:11:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:11:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-07-20 06:11:28,772 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 06:11:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 06:11:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-07-20 06:11:28,773 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-07-20 06:11:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-07-20 06:11:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-07-20 06:11:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 06:11:28,774 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-07-20 06:11:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-07-20 06:11:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 06:11:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:11:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:11:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 06:11:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 06:11:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 06:11:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 06:11:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 06:11:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 06:11:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 06:11:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 06:11:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:11:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 06:11:28,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:11:30,305 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:11:30,305 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-20 06:11:30,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:30 BoogieIcfgContainer [2020-07-20 06:11:30,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:11:30,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:11:30,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:11:30,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:11:30,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:11:27" (1/3) ... [2020-07-20 06:11:30,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b15e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:30, skipping insertion in model container [2020-07-20 06:11:30,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:11:28" (2/3) ... [2020-07-20 06:11:30,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b15e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:11:30, skipping insertion in model container [2020-07-20 06:11:30,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:11:30" (3/3) ... [2020-07-20 06:11:30,322 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_3.c [2020-07-20 06:11:30,331 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:11:30,339 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:11:30,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:11:30,381 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:11:30,381 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:11:30,381 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:11:30,382 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:11:30,382 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:11:30,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:11:30,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:11:30,383 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:11:30,409 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-07-20 06:11:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 06:11:30,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:30,422 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 06:11:30,423 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-07-20 06:11:30,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:30,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047385094] [2020-07-20 06:11:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:30,959 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 06:11:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:31,043 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 06:11:31,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047385094] [2020-07-20 06:11:31,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:11:31,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 06:11:31,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528648509] [2020-07-20 06:11:31,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 06:11:31,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:31,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 06:11:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:11:31,071 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 5 states. [2020-07-20 06:11:31,214 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 06:11:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:32,251 INFO L93 Difference]: Finished difference Result 264 states and 405 transitions. [2020-07-20 06:11:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:11:32,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-07-20 06:11:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:32,269 INFO L225 Difference]: With dead ends: 264 [2020-07-20 06:11:32,270 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 06:11:32,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:11:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 06:11:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2020-07-20 06:11:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 06:11:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-07-20 06:11:32,361 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-07-20 06:11:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:32,362 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-07-20 06:11:32,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 06:11:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-07-20 06:11:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 06:11:32,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:32,366 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 06:11:32,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:11:32,367 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:32,368 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-07-20 06:11:32,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:32,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724788544] [2020-07-20 06:11:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:32,585 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 06:11:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:32,732 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 06:11:32,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724788544] [2020-07-20 06:11:32,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291672715] [2020-07-20 06:11:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b7a3d78 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:32,963 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b7a3d78 issued 2 check-sat command(s) [2020-07-20 06:11:32,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:11:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:33,012 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 06:11:33,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:11:33,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 06:11:33,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456648272] [2020-07-20 06:11:33,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:11:33,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:11:33,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:11:33,017 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 3 states. [2020-07-20 06:11:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:33,051 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2020-07-20 06:11:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:11:33,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-20 06:11:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:33,054 INFO L225 Difference]: With dead ends: 170 [2020-07-20 06:11:33,055 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 06:11:33,056 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 06:11:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 06:11:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-07-20 06:11:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 06:11:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2020-07-20 06:11:33,084 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 41 [2020-07-20 06:11:33,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:33,085 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2020-07-20 06:11:33,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:11:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2020-07-20 06:11:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 06:11:33,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:33,087 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 06:11:33,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:11:33,301 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash -469545370, now seen corresponding path program 1 times [2020-07-20 06:11:33,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:33,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376782375] [2020-07-20 06:11:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:11:33,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376782375] [2020-07-20 06:11:33,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439097343] [2020-07-20 06:11:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37e3bd50 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 06:11:33,760 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37e3bd50 issued 2 check-sat command(s) [2020-07-20 06:11:33,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 06:11:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:33,791 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 06:11:33,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:11:33,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 06:11:33,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688109702] [2020-07-20 06:11:33,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:11:33,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:11:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:11:33,794 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand 3 states. [2020-07-20 06:11:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:33,833 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2020-07-20 06:11:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:11:33,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-07-20 06:11:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:33,837 INFO L225 Difference]: With dead ends: 180 [2020-07-20 06:11:33,837 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 06:11:33,838 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 06:11:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 06:11:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2020-07-20 06:11:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 06:11:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-07-20 06:11:33,860 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 42 [2020-07-20 06:11:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:33,861 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-07-20 06:11:33,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:11:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-07-20 06:11:33,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 06:11:33,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:33,864 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 06:11:34,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:34,080 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1206740640, now seen corresponding path program 1 times [2020-07-20 06:11:34,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:34,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988503458] [2020-07-20 06:11:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:34,330 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 06:11:34,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988503458] [2020-07-20 06:11:34,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356200346] [2020-07-20 06:11:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dd2ddee No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:34,508 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1dd2ddee issued 2 check-sat command(s) [2020-07-20 06:11:34,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 06:11:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:34,545 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 06:11:34,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 06:11:34,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-07-20 06:11:34,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95864384] [2020-07-20 06:11:34,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:11:34,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:34,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:11:34,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:11:34,548 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 4 states. [2020-07-20 06:11:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:34,611 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2020-07-20 06:11:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:11:34,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-20 06:11:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:34,614 INFO L225 Difference]: With dead ends: 161 [2020-07-20 06:11:34,614 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 06:11:34,615 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 06:11:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 06:11:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-20 06:11:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 06:11:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-07-20 06:11:34,636 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 47 [2020-07-20 06:11:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:34,636 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-07-20 06:11:34,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:11:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-07-20 06:11:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 06:11:34,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:34,640 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 06:11:34,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:34,854 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 222099566, now seen corresponding path program 1 times [2020-07-20 06:11:34,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:34,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463659440] [2020-07-20 06:11:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,080 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 06:11:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 06:11:35,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463659440] [2020-07-20 06:11:35,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639469356] [2020-07-20 06:11:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b16cfba 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 06:11:35,477 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b16cfba issued 2 check-sat command(s) [2020-07-20 06:11:35,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:35,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 06:11:35,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:35,558 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 06:11:35,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:35,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 06:11:35,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209185104] [2020-07-20 06:11:35,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:11:35,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:11:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:11:35,561 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 10 states. [2020-07-20 06:11:35,706 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 06:11:36,155 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 06:11:36,331 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 06:11:36,701 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 06:11:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:37,705 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2020-07-20 06:11:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:11:37,711 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-07-20 06:11:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:37,716 INFO L225 Difference]: With dead ends: 293 [2020-07-20 06:11:37,716 INFO L226 Difference]: Without dead ends: 181 [2020-07-20 06:11:37,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-20 06:11:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-20 06:11:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 142. [2020-07-20 06:11:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 06:11:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-20 06:11:37,743 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 51 [2020-07-20 06:11:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:37,744 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-20 06:11:37,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:11:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-20 06:11:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 06:11:37,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:37,747 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 06:11:37,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:37,962 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1250021058, now seen corresponding path program 2 times [2020-07-20 06:11:37,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:37,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526573390] [2020-07-20 06:11:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:38,208 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 06:11:38,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526573390] [2020-07-20 06:11:38,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197695567] [2020-07-20 06:11:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4df7b242 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:38,467 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4df7b242 issued 3 check-sat command(s) [2020-07-20 06:11:38,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:38,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:11:38,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:38,531 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 06:11:38,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:38,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-07-20 06:11:38,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300371501] [2020-07-20 06:11:38,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:11:38,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:38,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:11:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:11:38,534 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand 8 states. [2020-07-20 06:11:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:40,015 INFO L93 Difference]: Finished difference Result 326 states and 458 transitions. [2020-07-20 06:11:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:11:40,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-07-20 06:11:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:40,018 INFO L225 Difference]: With dead ends: 326 [2020-07-20 06:11:40,018 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 06:11:40,019 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 06:11:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 06:11:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 144. [2020-07-20 06:11:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 06:11:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2020-07-20 06:11:40,039 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 57 [2020-07-20 06:11:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:40,040 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2020-07-20 06:11:40,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:11:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2020-07-20 06:11:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 06:11:40,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:40,041 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 06:11:40,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 06:11:40,255 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:40,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1340728960, now seen corresponding path program 3 times [2020-07-20 06:11:40,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:40,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551587459] [2020-07-20 06:11:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 06:11:40,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551587459] [2020-07-20 06:11:40,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740327866] [2020-07-20 06:11:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@18a41aa3 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 06:11:40,766 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@18a41aa3 issued 3 check-sat command(s) [2020-07-20 06:11:40,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:40,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:11:40,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:40,843 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 06:11:40,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:40,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-20 06:11:40,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333325868] [2020-07-20 06:11:40,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:11:40,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:11:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:11:40,845 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand 9 states. [2020-07-20 06:11:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:42,571 INFO L93 Difference]: Finished difference Result 347 states and 491 transitions. [2020-07-20 06:11:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:11:42,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-07-20 06:11:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:42,574 INFO L225 Difference]: With dead ends: 347 [2020-07-20 06:11:42,574 INFO L226 Difference]: Without dead ends: 223 [2020-07-20 06:11:42,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:11:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-20 06:11:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 146. [2020-07-20 06:11:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 06:11:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2020-07-20 06:11:42,594 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 59 [2020-07-20 06:11:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:42,595 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2020-07-20 06:11:42,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:11:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2020-07-20 06:11:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 06:11:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:42,596 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 06:11:42,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:42,812 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:42,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1683290434, now seen corresponding path program 4 times [2020-07-20 06:11:42,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:42,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135944685] [2020-07-20 06:11:42,814 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74f63566 [2020-07-20 06:11:42,859 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 06:11:42,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971497104] [2020-07-20 06:11:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c8ba5d 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