/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:53:10,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:53:10,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:53:10,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:53:10,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:53:10,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:53:10,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:53:10,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:53:10,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:53:10,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:53:10,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:53:10,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:53:10,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:53:10,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:53:10,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:53:10,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:53:10,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:53:10,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:53:10,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:53:10,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:53:10,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:53:10,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:53:10,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:53:10,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:53:10,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:53:10,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:53:10,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:53:10,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:53:10,636 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 01:53:10,657 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:53:10,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:53:10,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:53:10,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:53:10,659 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:53:10,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:53:10,660 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:53:10,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:53:10,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:53:10,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:53:10,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:53:10,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:53:10,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:53:10,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:53:10,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:53:10,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:53:10,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:53:10,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:53:10,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:53:10,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:53:10,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:53:10,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:53:10,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:53:10,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:53:10,664 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:53:10,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:53:10,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:53:10,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:53:10,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:53:10,665 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 01:53:10,951 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:53:10,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:53:10,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:53:10,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:53:10,970 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:53:10,970 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-07-20 01:53:11,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f29a4c06/bf742f2fcf5941fab53218d6a29c7e44/FLAG1ea616b0d [2020-07-20 01:53:11,543 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:53:11,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/ofuf_2.c [2020-07-20 01:53:11,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f29a4c06/bf742f2fcf5941fab53218d6a29c7e44/FLAG1ea616b0d [2020-07-20 01:53:11,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f29a4c06/bf742f2fcf5941fab53218d6a29c7e44 [2020-07-20 01:53:11,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:53:11,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:53:11,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:53:11,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:53:11,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:53:11,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:53:11" (1/1) ... [2020-07-20 01:53:11,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318f21ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:11, skipping insertion in model container [2020-07-20 01:53:11,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:53:11" (1/1) ... [2020-07-20 01:53:11,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:53:11,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:53:12,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:53:12,364 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:53:12,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:53:12,462 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:53:12,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12 WrapperNode [2020-07-20 01:53:12,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:53:12,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:53:12,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:53:12,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:53:12,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:12,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:12,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:12,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:12,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:12,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:12,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:12,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:53:12,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:53:12,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:53:12,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:53:12,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (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 01:53:12,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:53:12,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:53:12,626 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:53:12,626 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-07-20 01:53:12,626 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-07-20 01:53:12,626 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-07-20 01:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-07-20 01:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-07-20 01:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-07-20 01:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-07-20 01:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-07-20 01:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:53:12,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:53:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:53:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:53:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:53:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-07-20 01:53:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 01:53:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 01:53:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-07-20 01:53:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-07-20 01:53:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-07-20 01:53:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-07-20 01:53:12,629 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:53:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-07-20 01:53:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-07-20 01:53:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 01:53:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:53:12,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:53:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:53:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 01:53:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:53:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 01:53:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:53:12,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:53:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:53:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 01:53:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:53:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 01:53:12,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:53:15,551 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:53:15,551 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-20 01:53:15,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:53:15 BoogieIcfgContainer [2020-07-20 01:53:15,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:53:15,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:53:15,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:53:15,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:53:15,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:53:11" (1/3) ... [2020-07-20 01:53:15,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f26c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:53:15, skipping insertion in model container [2020-07-20 01:53:15,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:12" (2/3) ... [2020-07-20 01:53:15,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f26c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:53:15, skipping insertion in model container [2020-07-20 01:53:15,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:53:15" (3/3) ... [2020-07-20 01:53:15,566 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_2.c [2020-07-20 01:53:15,578 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:53:15,586 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:53:15,599 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:53:15,620 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:53:15,621 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:53:15,621 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:53:15,621 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:53:15,621 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:53:15,622 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:53:15,622 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:53:15,622 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:53:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-07-20 01:53:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 01:53:15,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:15,656 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 01:53:15,657 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:15,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:15,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-07-20 01:53:15,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:15,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723447209] [2020-07-20 01:53:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:16,197 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 01:53:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:16,285 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 01:53:16,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723447209] [2020-07-20 01:53:16,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:53:16,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:53:16,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040043653] [2020-07-20 01:53:16,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:53:16,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:53:16,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:53:16,311 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 5 states. [2020-07-20 01:53:16,488 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 01:53:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:17,468 INFO L93 Difference]: Finished difference Result 264 states and 405 transitions. [2020-07-20 01:53:17,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:53:17,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-07-20 01:53:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:17,486 INFO L225 Difference]: With dead ends: 264 [2020-07-20 01:53:17,486 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 01:53:17,492 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 01:53:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 01:53:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2020-07-20 01:53:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 01:53:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-07-20 01:53:17,569 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-07-20 01:53:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:17,569 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-07-20 01:53:17,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:53:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-07-20 01:53:17,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 01:53:17,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:17,573 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 01:53:17,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:53:17,574 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:17,575 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-07-20 01:53:17,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:17,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745116370] [2020-07-20 01:53:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,772 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 01:53:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,908 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 01:53:17,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745116370] [2020-07-20 01:53:17,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408732326] [2020-07-20 01:53:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21945a13 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:18,097 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@21945a13 issued 2 check-sat command(s) [2020-07-20 01:53:18,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:18,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:53:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:18,142 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 01:53:18,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:53:18,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 01:53:18,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013532035] [2020-07-20 01:53:18,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:53:18,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:53:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:53:18,146 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 3 states. [2020-07-20 01:53:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:18,178 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2020-07-20 01:53:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:53:18,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-20 01:53:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:18,181 INFO L225 Difference]: With dead ends: 170 [2020-07-20 01:53:18,181 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 01:53:18,183 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 01:53:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 01:53:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-07-20 01:53:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 01:53:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2020-07-20 01:53:18,205 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 41 [2020-07-20 01:53:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:18,205 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2020-07-20 01:53:18,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:53:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2020-07-20 01:53:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 01:53:18,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:18,208 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 01:53:18,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:53:18,422 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:18,422 INFO L82 PathProgramCache]: Analyzing trace with hash -469545370, now seen corresponding path program 1 times [2020-07-20 01:53:18,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:18,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772092522] [2020-07-20 01:53:18,423 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:53:18,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772092522] [2020-07-20 01:53:18,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096437103] [2020-07-20 01:53:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@110899e5 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 01:53:18,846 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@110899e5 issued 2 check-sat command(s) [2020-07-20 01:53:18,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:53:18,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:18,873 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 01:53:18,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:53:18,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 01:53:18,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195737779] [2020-07-20 01:53:18,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:53:18,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:53:18,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:53:18,876 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand 3 states. [2020-07-20 01:53:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:18,911 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2020-07-20 01:53:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:53:18,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-07-20 01:53:18,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:18,914 INFO L225 Difference]: With dead ends: 180 [2020-07-20 01:53:18,914 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 01:53:18,915 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 01:53:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 01:53:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2020-07-20 01:53:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 01:53:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-07-20 01:53:18,935 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 42 [2020-07-20 01:53:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:18,935 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-07-20 01:53:18,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:53:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-07-20 01:53:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 01:53:18,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:18,938 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 01:53:19,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:19,153 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:19,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1206740640, now seen corresponding path program 1 times [2020-07-20 01:53:19,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:19,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086338359] [2020-07-20 01:53:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,414 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 01:53:19,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086338359] [2020-07-20 01:53:19,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257465648] [2020-07-20 01:53:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2171c004 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:19,583 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2171c004 issued 2 check-sat command(s) [2020-07-20 01:53:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:53:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:19,620 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 01:53:19,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:53:19,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-07-20 01:53:19,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602028] [2020-07-20 01:53:19,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:53:19,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:19,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:53:19,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:53:19,622 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 4 states. [2020-07-20 01:53:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:19,677 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2020-07-20 01:53:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:53:19,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-20 01:53:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:19,679 INFO L225 Difference]: With dead ends: 161 [2020-07-20 01:53:19,679 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 01:53:19,680 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 01:53:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 01:53:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-20 01:53:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 01:53:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-07-20 01:53:19,702 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 47 [2020-07-20 01:53:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:19,703 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-07-20 01:53:19,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:53:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-07-20 01:53:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 01:53:19,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:19,706 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 01:53:19,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:19,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash 222099566, now seen corresponding path program 1 times [2020-07-20 01:53:19,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:19,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095162783] [2020-07-20 01:53:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:20,087 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 01:53:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:53:20,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095162783] [2020-07-20 01:53:20,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80899075] [2020-07-20 01:53:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a3168 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 01:53:20,341 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@66a3168 issued 2 check-sat command(s) [2020-07-20 01:53:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:53:20,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:20,424 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 01:53:20,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:53:20,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 01:53:20,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481064438] [2020-07-20 01:53:20,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:53:20,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:53:20,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:53:20,426 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 10 states. [2020-07-20 01:53:20,547 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 01:53:20,968 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 01:53:21,141 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 01:53:21,376 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 01:53:21,551 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 01:53:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:25,026 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2020-07-20 01:53:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:53:25,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-07-20 01:53:25,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:25,029 INFO L225 Difference]: With dead ends: 293 [2020-07-20 01:53:25,030 INFO L226 Difference]: Without dead ends: 181 [2020-07-20 01:53:25,031 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 01:53:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-20 01:53:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 142. [2020-07-20 01:53:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 01:53:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-20 01:53:25,052 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 51 [2020-07-20 01:53:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:25,052 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-20 01:53:25,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:53:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-20 01:53:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 01:53:25,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:25,054 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 01:53:25,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:25,268 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1250021058, now seen corresponding path program 2 times [2020-07-20 01:53:25,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:25,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162293284] [2020-07-20 01:53:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:25,530 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 01:53:25,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162293284] [2020-07-20 01:53:25,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577670073] [2020-07-20 01:53:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34020ded No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:25,774 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34020ded issued 3 check-sat command(s) [2020-07-20 01:53:25,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:25,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:53:25,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:25,839 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 01:53:25,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:53:25,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-07-20 01:53:25,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347391685] [2020-07-20 01:53:25,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:53:25,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:25,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:53:25,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:53:25,842 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand 8 states. [2020-07-20 01:53:25,976 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 01:53:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:27,326 INFO L93 Difference]: Finished difference Result 326 states and 458 transitions. [2020-07-20 01:53:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:53:27,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-07-20 01:53:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:27,329 INFO L225 Difference]: With dead ends: 326 [2020-07-20 01:53:27,330 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 01:53:27,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:53:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 01:53:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 144. [2020-07-20 01:53:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 01:53:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2020-07-20 01:53:27,351 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 57 [2020-07-20 01:53:27,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:27,352 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2020-07-20 01:53:27,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:53:27,352 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2020-07-20 01:53:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 01:53:27,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:27,354 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 01:53:27,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:53:27,569 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1340728960, now seen corresponding path program 3 times [2020-07-20 01:53:27,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:27,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354613773] [2020-07-20 01:53:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:27,746 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 01:53:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 01:53:27,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354613773] [2020-07-20 01:53:27,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643999934] [2020-07-20 01:53:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75291971 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 01:53:28,437 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75291971 issued 3 check-sat command(s) [2020-07-20 01:53:28,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 01:53:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:28,488 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 01:53:28,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:53:28,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-20 01:53:28,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754760099] [2020-07-20 01:53:28,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:53:28,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:28,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:53:28,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:53:28,490 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand 9 states. [2020-07-20 01:53:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:30,299 INFO L93 Difference]: Finished difference Result 347 states and 491 transitions. [2020-07-20 01:53:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:53:30,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-07-20 01:53:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:30,306 INFO L225 Difference]: With dead ends: 347 [2020-07-20 01:53:30,306 INFO L226 Difference]: Without dead ends: 223 [2020-07-20 01:53:30,307 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 01:53:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-20 01:53:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 146. [2020-07-20 01:53:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 01:53:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2020-07-20 01:53:30,328 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 59 [2020-07-20 01:53:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:30,329 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2020-07-20 01:53:30,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:53:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2020-07-20 01:53:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 01:53:30,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:30,330 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 01:53:30,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:30,546 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1683290434, now seen corresponding path program 4 times [2020-07-20 01:53:30,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:30,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337300096] [2020-07-20 01:53:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79e173bf [2020-07-20 01:53:30,615 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:53:30,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116566086] [2020-07-20 01:53:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50580d9b 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