/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:02:42,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:02:42,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:02:42,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:02:42,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:02:42,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:02:42,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:02:42,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:02:43,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:02:43,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:02:43,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:02:43,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:02:43,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:02:43,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:02:43,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:02:43,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:02:43,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:02:43,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:02:43,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:02:43,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:02:43,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:02:43,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:02:43,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:02:43,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:02:43,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 23:02:43,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:02:43,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:02:43,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:02:43,055 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 23:02:43,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:02:43,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:02:43,081 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:02:43,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:02:43,081 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:02:43,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:02:43,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:02:43,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:02:43,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:02:43,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:02:43,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:02:43,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:02:43,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:02:43,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:02:43,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:02:43,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:02:43,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:02:43,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:02:43,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:02:43,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:02:43,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:02:43,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:02:43,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:02:43,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:02:43,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:02:43,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:02:43,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:43,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:02:43,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:02:43,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 23:02:43,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:02:43,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:02:43,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:02:43,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:02:43,423 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:02:43,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 23:02:43,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3a66c19/d903fbb025d74e0893fa93560d90ca7d/FLAG159577bb5 [2020-07-20 23:02:44,290 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:02:44,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 23:02:44,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3a66c19/d903fbb025d74e0893fa93560d90ca7d/FLAG159577bb5 [2020-07-20 23:02:44,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3a66c19/d903fbb025d74e0893fa93560d90ca7d [2020-07-20 23:02:44,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:02:44,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:02:44,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:02:44,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:02:44,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:02:44,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:02:44" (1/1) ... [2020-07-20 23:02:44,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606f5cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:44, skipping insertion in model container [2020-07-20 23:02:44,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:02:44" (1/1) ... [2020-07-20 23:02:44,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:02:44,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:02:47,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:02:47,026 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:02:48,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:02:48,980 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:02:48,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48 WrapperNode [2020-07-20 23:02:48,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:02:48,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:02:48,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:02:48,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:02:49,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (1/1) ... [2020-07-20 23:02:49,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (1/1) ... [2020-07-20 23:02:49,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (1/1) ... [2020-07-20 23:02:49,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (1/1) ... [2020-07-20 23:02:49,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (1/1) ... [2020-07-20 23:02:49,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (1/1) ... [2020-07-20 23:02:49,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (1/1) ... [2020-07-20 23:02:49,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:02:49,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:02:49,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:02:49,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:02:49,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (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 23:02:49,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:02:49,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:02:49,359 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:02:49,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:02:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:02:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:02:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:02:49,361 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:02:49,361 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:02:49,361 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:02:49,361 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:02:49,362 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:02:49,362 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:02:49,362 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:02:49,362 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:02:49,363 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:02:49,363 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 23:02:49,363 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:02:49,363 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:02:49,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:02:49,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:02:49,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:02:55,529 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:02:55,529 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:02:55,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:02:55 BoogieIcfgContainer [2020-07-20 23:02:55,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:02:55,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:02:55,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:02:55,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:02:55,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:02:44" (1/3) ... [2020-07-20 23:02:55,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6947094e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:02:55, skipping insertion in model container [2020-07-20 23:02:55,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:02:48" (2/3) ... [2020-07-20 23:02:55,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6947094e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:02:55, skipping insertion in model container [2020-07-20 23:02:55,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:02:55" (3/3) ... [2020-07-20 23:02:55,560 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 23:02:55,572 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:02:55,583 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 23:02:55,597 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 23:02:55,631 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:02:55,631 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:02:55,632 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:02:55,632 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:02:55,632 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:02:55,632 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:02:55,632 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:02:55,632 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:02:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-07-20 23:02:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-20 23:02:55,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:02:55,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:55,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:02:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:02:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-07-20 23:02:55,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:02:55,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028965554] [2020-07-20 23:02:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:56,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:02:56,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:02:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:02:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:02:56,623 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 23:02:56,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:02:56,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028965554] [2020-07-20 23:02:56,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:02:56,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:02:56,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192944642] [2020-07-20 23:02:56,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:02:56,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:02:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:02:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:02:56,651 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 4 states. [2020-07-20 23:02:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:02:56,880 INFO L93 Difference]: Finished difference Result 3578 states and 6234 transitions. [2020-07-20 23:02:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:02:56,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 290 [2020-07-20 23:02:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:02:56,927 INFO L225 Difference]: With dead ends: 3578 [2020-07-20 23:02:56,927 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 23:02:56,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:02:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 23:02:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 23:02:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 23:02:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3921 transitions. [2020-07-20 23:02:57,126 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3921 transitions. Word has length 290 [2020-07-20 23:02:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:02:57,130 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3921 transitions. [2020-07-20 23:02:57,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:02:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3921 transitions. [2020-07-20 23:02:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 23:02:57,145 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:02:57,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:57,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:57,360 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:02:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:02:57,361 INFO L82 PathProgramCache]: Analyzing trace with hash -694396288, now seen corresponding path program 1 times [2020-07-20 23:02:57,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:02:57,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112218453] [2020-07-20 23:02:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:57,896 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:02:57,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:02:57,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:02:57,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:02:58,018 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 23:02:58,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:02:58,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112218453] [2020-07-20 23:02:58,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:02:58,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:02:58,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686971911] [2020-07-20 23:02:58,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:02:58,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:02:58,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:02:58,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:02:58,027 INFO L87 Difference]: Start difference. First operand 2245 states and 3921 transitions. Second operand 4 states. [2020-07-20 23:02:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:02:58,149 INFO L93 Difference]: Finished difference Result 3004 states and 5216 transitions. [2020-07-20 23:02:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:02:58,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-07-20 23:02:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:02:58,168 INFO L225 Difference]: With dead ends: 3004 [2020-07-20 23:02:58,168 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 23:02:58,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:02:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 23:02:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 23:02:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 23:02:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3911 transitions. [2020-07-20 23:02:58,244 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3911 transitions. Word has length 299 [2020-07-20 23:02:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:02:58,253 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3911 transitions. [2020-07-20 23:02:58,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:02:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3911 transitions. [2020-07-20 23:02:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-07-20 23:02:58,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:02:58,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:58,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:58,478 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:02:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:02:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash -61763353, now seen corresponding path program 1 times [2020-07-20 23:02:58,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:02:58,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868422430] [2020-07-20 23:02:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:58,877 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:02:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:02:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:02:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:02:59,051 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 23:02:59,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:02:59,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868422430] [2020-07-20 23:02:59,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:02:59,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:02:59,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905735999] [2020-07-20 23:02:59,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:02:59,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:02:59,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:02:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:02:59,055 INFO L87 Difference]: Start difference. First operand 2245 states and 3911 transitions. Second operand 4 states. [2020-07-20 23:02:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:02:59,155 INFO L93 Difference]: Finished difference Result 2628 states and 4562 transitions. [2020-07-20 23:02:59,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:02:59,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 308 [2020-07-20 23:02:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:02:59,168 INFO L225 Difference]: With dead ends: 2628 [2020-07-20 23:02:59,169 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 23:02:59,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:02:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 23:02:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 23:02:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 23:02:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3901 transitions. [2020-07-20 23:02:59,246 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3901 transitions. Word has length 308 [2020-07-20 23:02:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:02:59,247 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3901 transitions. [2020-07-20 23:02:59,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:02:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3901 transitions. [2020-07-20 23:02:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-07-20 23:02:59,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:02:59,259 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:59,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:59,473 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:02:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:02:59,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1129752022, now seen corresponding path program 1 times [2020-07-20 23:02:59,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:02:59,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645748023] [2020-07-20 23:02:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:59,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:02:59,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:02:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:02:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:02:59,943 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 23:02:59,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:02:59,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645748023] [2020-07-20 23:02:59,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:02:59,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:02:59,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537655008] [2020-07-20 23:02:59,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:02:59,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:02:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:02:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:02:59,946 INFO L87 Difference]: Start difference. First operand 2245 states and 3901 transitions. Second operand 4 states. [2020-07-20 23:03:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:00,063 INFO L93 Difference]: Finished difference Result 3756 states and 6454 transitions. [2020-07-20 23:03:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:00,064 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-07-20 23:03:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:00,076 INFO L225 Difference]: With dead ends: 3756 [2020-07-20 23:03:00,076 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 23:03:00,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 23:03:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 23:03:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 23:03:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3891 transitions. [2020-07-20 23:03:00,159 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3891 transitions. Word has length 317 [2020-07-20 23:03:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:00,159 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3891 transitions. [2020-07-20 23:03:00,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3891 transitions. [2020-07-20 23:03:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 23:03:00,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:00,171 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:00,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:00,385 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:00,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1425361415, now seen corresponding path program 1 times [2020-07-20 23:03:00,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:00,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106921187] [2020-07-20 23:03:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:00,804 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:03:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:00,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:03:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:00,899 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 23:03:00,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:00,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106921187] [2020-07-20 23:03:00,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:00,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:00,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531113045] [2020-07-20 23:03:00,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:00,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:00,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:00,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:00,902 INFO L87 Difference]: Start difference. First operand 2245 states and 3891 transitions. Second operand 4 states. [2020-07-20 23:03:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:00,998 INFO L93 Difference]: Finished difference Result 3380 states and 5810 transitions. [2020-07-20 23:03:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:00,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 23:03:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:01,010 INFO L225 Difference]: With dead ends: 3380 [2020-07-20 23:03:01,010 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 23:03:01,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 23:03:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 23:03:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 23:03:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3881 transitions. [2020-07-20 23:03:01,073 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3881 transitions. Word has length 326 [2020-07-20 23:03:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:01,074 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3881 transitions. [2020-07-20 23:03:01,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3881 transitions. [2020-07-20 23:03:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:03:01,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:01,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:01,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:01,295 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash 296536054, now seen corresponding path program 1 times [2020-07-20 23:03:01,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:01,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892844475] [2020-07-20 23:03:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:01,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:03:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:01,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:03:01,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:01,890 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 23:03:01,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:01,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892844475] [2020-07-20 23:03:01,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:01,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:01,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426822213] [2020-07-20 23:03:01,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:01,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:01,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:01,898 INFO L87 Difference]: Start difference. First operand 2245 states and 3881 transitions. Second operand 4 states. [2020-07-20 23:03:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:01,991 INFO L93 Difference]: Finished difference Result 2816 states and 4844 transitions. [2020-07-20 23:03:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:01,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 23:03:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:02,003 INFO L225 Difference]: With dead ends: 2816 [2020-07-20 23:03:02,003 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 23:03:02,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 23:03:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 23:03:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 23:03:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-07-20 23:03:02,061 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 335 [2020-07-20 23:03:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:02,062 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-07-20 23:03:02,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-07-20 23:03:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 23:03:02,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:02,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:02,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:02,277 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:02,278 INFO L82 PathProgramCache]: Analyzing trace with hash -893241262, now seen corresponding path program 1 times [2020-07-20 23:03:02,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:02,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733705513] [2020-07-20 23:03:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:02,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:03:02,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:02,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 23:03:02,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:03:02,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:02,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733705513] [2020-07-20 23:03:02,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:02,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:02,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352573587] [2020-07-20 23:03:02,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:02,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:02,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:02,839 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2020-07-20 23:03:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:02,914 INFO L93 Difference]: Finished difference Result 3192 states and 5458 transitions. [2020-07-20 23:03:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:02,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-20 23:03:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:02,928 INFO L225 Difference]: With dead ends: 3192 [2020-07-20 23:03:02,928 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 23:03:02,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 23:03:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 23:03:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 23:03:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3861 transitions. [2020-07-20 23:03:02,986 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3861 transitions. Word has length 344 [2020-07-20 23:03:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:02,987 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3861 transitions. [2020-07-20 23:03:02,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3861 transitions. [2020-07-20 23:03:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-07-20 23:03:02,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:02,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:03,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:03,209 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1333168010, now seen corresponding path program 1 times [2020-07-20 23:03:03,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:03,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622602737] [2020-07-20 23:03:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:03,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:03:03,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:03,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:03:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:03,818 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 23:03:03,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:03,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622602737] [2020-07-20 23:03:03,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:03,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:03:03,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538903733] [2020-07-20 23:03:03,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:03:03,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:03:03,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:03,820 INFO L87 Difference]: Start difference. First operand 2245 states and 3861 transitions. Second operand 3 states. [2020-07-20 23:03:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:04,199 INFO L93 Difference]: Finished difference Result 3595 states and 6139 transitions. [2020-07-20 23:03:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:03:04,200 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 353 [2020-07-20 23:03:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:04,218 INFO L225 Difference]: With dead ends: 3595 [2020-07-20 23:03:04,219 INFO L226 Difference]: Without dead ends: 3400 [2020-07-20 23:03:04,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-07-20 23:03:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2562. [2020-07-20 23:03:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2562 states. [2020-07-20 23:03:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 4396 transitions. [2020-07-20 23:03:04,301 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 4396 transitions. Word has length 353 [2020-07-20 23:03:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:04,302 INFO L479 AbstractCegarLoop]: Abstraction has 2562 states and 4396 transitions. [2020-07-20 23:03:04,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:03:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 4396 transitions. [2020-07-20 23:03:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-20 23:03:04,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:04,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:04,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:04,525 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:04,526 INFO L82 PathProgramCache]: Analyzing trace with hash 810731899, now seen corresponding path program 1 times [2020-07-20 23:03:04,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:04,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211926786] [2020-07-20 23:03:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:04,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:03:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:03:04,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:05,168 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 23:03:05,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:05,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211926786] [2020-07-20 23:03:05,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:05,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:03:05,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909746835] [2020-07-20 23:03:05,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:03:05,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:05,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:03:05,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:05,171 INFO L87 Difference]: Start difference. First operand 2562 states and 4396 transitions. Second operand 3 states. [2020-07-20 23:03:05,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:05,433 INFO L93 Difference]: Finished difference Result 4379 states and 7458 transitions. [2020-07-20 23:03:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:03:05,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 354 [2020-07-20 23:03:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:05,476 INFO L225 Difference]: With dead ends: 4379 [2020-07-20 23:03:05,478 INFO L226 Difference]: Without dead ends: 4008 [2020-07-20 23:03:05,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2020-07-20 23:03:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3162. [2020-07-20 23:03:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3162 states. [2020-07-20 23:03:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3162 states to 3162 states and 5408 transitions. [2020-07-20 23:03:05,597 INFO L78 Accepts]: Start accepts. Automaton has 3162 states and 5408 transitions. Word has length 354 [2020-07-20 23:03:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:05,598 INFO L479 AbstractCegarLoop]: Abstraction has 3162 states and 5408 transitions. [2020-07-20 23:03:05,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:03:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3162 states and 5408 transitions. [2020-07-20 23:03:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-07-20 23:03:05,608 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:05,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:05,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:05,824 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1443289635, now seen corresponding path program 1 times [2020-07-20 23:03:05,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:05,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681780311] [2020-07-20 23:03:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:06,269 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:03:06,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:06,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:03:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:06,418 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 23:03:06,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:06,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681780311] [2020-07-20 23:03:06,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:06,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:03:06,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962300031] [2020-07-20 23:03:06,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:03:06,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:06,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:03:06,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:06,421 INFO L87 Difference]: Start difference. First operand 3162 states and 5408 transitions. Second operand 3 states. [2020-07-20 23:03:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:06,688 INFO L93 Difference]: Finished difference Result 5632 states and 9562 transitions. [2020-07-20 23:03:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:03:06,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 355 [2020-07-20 23:03:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:06,703 INFO L225 Difference]: With dead ends: 5632 [2020-07-20 23:03:06,703 INFO L226 Difference]: Without dead ends: 4910 [2020-07-20 23:03:06,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:06,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2020-07-20 23:03:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 4260. [2020-07-20 23:03:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4260 states. [2020-07-20 23:03:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 7258 transitions. [2020-07-20 23:03:06,865 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 7258 transitions. Word has length 355 [2020-07-20 23:03:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:06,866 INFO L479 AbstractCegarLoop]: Abstraction has 4260 states and 7258 transitions. [2020-07-20 23:03:06,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:03:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 7258 transitions. [2020-07-20 23:03:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-07-20 23:03:06,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:06,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:07,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:07,093 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1701044866, now seen corresponding path program 1 times [2020-07-20 23:03:07,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:07,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248186598] [2020-07-20 23:03:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:07,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:03:07,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:03:07,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:07,781 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 23:03:07,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:07,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248186598] [2020-07-20 23:03:07,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:07,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:03:07,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722222193] [2020-07-20 23:03:07,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:03:07,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:03:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:07,786 INFO L87 Difference]: Start difference. First operand 4260 states and 7258 transitions. Second operand 3 states. [2020-07-20 23:03:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:08,189 INFO L93 Difference]: Finished difference Result 8095 states and 13700 transitions. [2020-07-20 23:03:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:03:08,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 356 [2020-07-20 23:03:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:08,215 INFO L225 Difference]: With dead ends: 8095 [2020-07-20 23:03:08,216 INFO L226 Difference]: Without dead ends: 6672 [2020-07-20 23:03:08,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6672 states. [2020-07-20 23:03:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6672 to 6216. [2020-07-20 23:03:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6216 states. [2020-07-20 23:03:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 10548 transitions. [2020-07-20 23:03:08,499 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 10548 transitions. Word has length 356 [2020-07-20 23:03:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:08,500 INFO L479 AbstractCegarLoop]: Abstraction has 6216 states and 10548 transitions. [2020-07-20 23:03:08,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:03:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 10548 transitions. [2020-07-20 23:03:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-07-20 23:03:08,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:08,513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:08,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:08,729 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash 395724612, now seen corresponding path program 1 times [2020-07-20 23:03:08,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:08,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466177743] [2020-07-20 23:03:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:09,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:03:09,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:09,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:03:09,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:09,348 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 23:03:09,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:09,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466177743] [2020-07-20 23:03:09,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:09,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:03:09,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406332767] [2020-07-20 23:03:09,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:03:09,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:03:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:09,351 INFO L87 Difference]: Start difference. First operand 6216 states and 10548 transitions. Second operand 3 states. [2020-07-20 23:03:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:09,711 INFO L93 Difference]: Finished difference Result 12700 states and 21430 transitions. [2020-07-20 23:03:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:03:09,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 357 [2020-07-20 23:03:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:09,737 INFO L225 Difference]: With dead ends: 12700 [2020-07-20 23:03:09,737 INFO L226 Difference]: Without dead ends: 9878 [2020-07-20 23:03:09,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9878 states. [2020-07-20 23:03:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9878 to 9612. [2020-07-20 23:03:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9612 states. [2020-07-20 23:03:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9612 states to 9612 states and 16246 transitions. [2020-07-20 23:03:10,048 INFO L78 Accepts]: Start accepts. Automaton has 9612 states and 16246 transitions. Word has length 357 [2020-07-20 23:03:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:10,049 INFO L479 AbstractCegarLoop]: Abstraction has 9612 states and 16246 transitions. [2020-07-20 23:03:10,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:03:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 9612 states and 16246 transitions. [2020-07-20 23:03:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-20 23:03:10,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:10,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:10,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:10,275 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:10,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1923570902, now seen corresponding path program 1 times [2020-07-20 23:03:10,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:10,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116068163] [2020-07-20 23:03:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:10,723 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:03:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 23:03:10,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:10,881 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 23:03:10,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:10,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116068163] [2020-07-20 23:03:10,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:10,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:10,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5307759] [2020-07-20 23:03:10,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:10,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:10,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:10,883 INFO L87 Difference]: Start difference. First operand 9612 states and 16246 transitions. Second operand 4 states. [2020-07-20 23:03:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:11,265 INFO L93 Difference]: Finished difference Result 18678 states and 31466 transitions. [2020-07-20 23:03:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:03:11,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 358 [2020-07-20 23:03:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:11,290 INFO L225 Difference]: With dead ends: 18678 [2020-07-20 23:03:11,290 INFO L226 Difference]: Without dead ends: 9612 [2020-07-20 23:03:11,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2020-07-20 23:03:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 9612. [2020-07-20 23:03:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9612 states. [2020-07-20 23:03:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9612 states to 9612 states and 16186 transitions. [2020-07-20 23:03:11,612 INFO L78 Accepts]: Start accepts. Automaton has 9612 states and 16186 transitions. Word has length 358 [2020-07-20 23:03:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:11,612 INFO L479 AbstractCegarLoop]: Abstraction has 9612 states and 16186 transitions. [2020-07-20 23:03:11,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 9612 states and 16186 transitions. [2020-07-20 23:03:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 23:03:11,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:11,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:11,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:11,837 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:11,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1730706966, now seen corresponding path program 1 times [2020-07-20 23:03:11,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:11,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514514436] [2020-07-20 23:03:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:12,296 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:03:12,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:03:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:12,850 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 23:03:12,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:12,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514514436] [2020-07-20 23:03:12,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:12,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:12,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205343770] [2020-07-20 23:03:12,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:12,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:12,853 INFO L87 Difference]: Start difference. First operand 9612 states and 16186 transitions. Second operand 4 states. [2020-07-20 23:03:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:13,625 INFO L93 Difference]: Finished difference Result 28407 states and 47861 transitions. [2020-07-20 23:03:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:13,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 23:03:13,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:13,689 INFO L225 Difference]: With dead ends: 28407 [2020-07-20 23:03:13,689 INFO L226 Difference]: Without dead ends: 18880 [2020-07-20 23:03:13,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18880 states. [2020-07-20 23:03:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18880 to 18876. [2020-07-20 23:03:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18876 states. [2020-07-20 23:03:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18876 states to 18876 states and 31704 transitions. [2020-07-20 23:03:15,348 INFO L78 Accepts]: Start accepts. Automaton has 18876 states and 31704 transitions. Word has length 417 [2020-07-20 23:03:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:15,349 INFO L479 AbstractCegarLoop]: Abstraction has 18876 states and 31704 transitions. [2020-07-20 23:03:15,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 18876 states and 31704 transitions. [2020-07-20 23:03:15,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 23:03:15,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:15,365 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:15,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:15,579 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:15,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash -568340488, now seen corresponding path program 1 times [2020-07-20 23:03:15,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:15,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245990524] [2020-07-20 23:03:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:16,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:03:16,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:16,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:03:16,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:16,330 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 23:03:16,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:16,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245990524] [2020-07-20 23:03:16,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:16,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:16,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469925587] [2020-07-20 23:03:16,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:16,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:16,332 INFO L87 Difference]: Start difference. First operand 18876 states and 31704 transitions. Second operand 4 states. [2020-07-20 23:03:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:17,464 INFO L93 Difference]: Finished difference Result 55838 states and 93837 transitions. [2020-07-20 23:03:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:17,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 23:03:17,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:17,578 INFO L225 Difference]: With dead ends: 55838 [2020-07-20 23:03:17,579 INFO L226 Difference]: Without dead ends: 37055 [2020-07-20 23:03:17,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37055 states. [2020-07-20 23:03:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37055 to 37051. [2020-07-20 23:03:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37051 states. [2020-07-20 23:03:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37051 states to 37051 states and 62046 transitions. [2020-07-20 23:03:19,063 INFO L78 Accepts]: Start accepts. Automaton has 37051 states and 62046 transitions. Word has length 417 [2020-07-20 23:03:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:19,064 INFO L479 AbstractCegarLoop]: Abstraction has 37051 states and 62046 transitions. [2020-07-20 23:03:19,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37051 states and 62046 transitions. [2020-07-20 23:03:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 23:03:19,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:19,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:19,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:19,303 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash -958965930, now seen corresponding path program 1 times [2020-07-20 23:03:19,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:19,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843006971] [2020-07-20 23:03:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:19,787 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:03:19,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:19,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:03:19,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:20,096 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 23:03:20,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:20,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843006971] [2020-07-20 23:03:20,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:20,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:20,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354571264] [2020-07-20 23:03:20,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:20,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:20,099 INFO L87 Difference]: Start difference. First operand 37051 states and 62046 transitions. Second operand 4 states. [2020-07-20 23:03:22,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:22,884 INFO L93 Difference]: Finished difference Result 109539 states and 183516 transitions. [2020-07-20 23:03:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:22,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 23:03:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:23,017 INFO L225 Difference]: With dead ends: 109539 [2020-07-20 23:03:23,018 INFO L226 Difference]: Without dead ends: 72677 [2020-07-20 23:03:23,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72677 states. [2020-07-20 23:03:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72677 to 72673. [2020-07-20 23:03:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72673 states. [2020-07-20 23:03:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72673 states to 72673 states and 121276 transitions. [2020-07-20 23:03:27,209 INFO L78 Accepts]: Start accepts. Automaton has 72673 states and 121276 transitions. Word has length 417 [2020-07-20 23:03:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:27,210 INFO L479 AbstractCegarLoop]: Abstraction has 72673 states and 121276 transitions. [2020-07-20 23:03:27,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 72673 states and 121276 transitions. [2020-07-20 23:03:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 23:03:27,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:27,242 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:27,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:27,443 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2050629003, now seen corresponding path program 1 times [2020-07-20 23:03:27,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:27,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475988192] [2020-07-20 23:03:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:27,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:03:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:03:27,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:28,062 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 23:03:28,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:28,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475988192] [2020-07-20 23:03:28,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:28,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:03:28,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719987553] [2020-07-20 23:03:28,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:03:28,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:28,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:03:28,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:28,064 INFO L87 Difference]: Start difference. First operand 72673 states and 121276 transitions. Second operand 3 states. [2020-07-20 23:03:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:31,528 INFO L93 Difference]: Finished difference Result 159061 states and 264944 transitions. [2020-07-20 23:03:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:03:31,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 417 [2020-07-20 23:03:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:31,692 INFO L225 Difference]: With dead ends: 159061 [2020-07-20 23:03:31,693 INFO L226 Difference]: Without dead ends: 116105 [2020-07-20 23:03:31,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:03:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116105 states. [2020-07-20 23:03:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116105 to 115469. [2020-07-20 23:03:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115469 states. [2020-07-20 23:03:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115469 states to 115469 states and 192220 transitions. [2020-07-20 23:03:37,537 INFO L78 Accepts]: Start accepts. Automaton has 115469 states and 192220 transitions. Word has length 417 [2020-07-20 23:03:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:37,538 INFO L479 AbstractCegarLoop]: Abstraction has 115469 states and 192220 transitions. [2020-07-20 23:03:37,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:03:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 115469 states and 192220 transitions. [2020-07-20 23:03:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 23:03:37,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:37,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:03:37,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:37,773 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:03:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:03:37,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2136326472, now seen corresponding path program 1 times [2020-07-20 23:03:37,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:03:37,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067077936] [2020-07-20 23:03:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:03:38,258 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:03:38,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:03:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:03:38,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:03:38,504 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 23:03:38,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:03:38,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067077936] [2020-07-20 23:03:38,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:03:38,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:03:38,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266460916] [2020-07-20 23:03:38,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:03:38,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:03:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:03:38,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:03:38,507 INFO L87 Difference]: Start difference. First operand 115469 states and 192220 transitions. Second operand 4 states. [2020-07-20 23:03:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:47,754 INFO L93 Difference]: Finished difference Result 342301 states and 569896 transitions. [2020-07-20 23:03:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:03:47,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 23:03:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:48,136 INFO L225 Difference]: With dead ends: 342301 [2020-07-20 23:03:48,136 INFO L226 Difference]: Without dead ends: 227213 [2020-07-20 23:03:48,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:03:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227213 states. [2020-07-20 23:03:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227213 to 227209. [2020-07-20 23:03:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227209 states. [2020-07-20 23:03:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227209 states to 227209 states and 376792 transitions. [2020-07-20 23:03:59,925 INFO L78 Accepts]: Start accepts. Automaton has 227209 states and 376792 transitions. Word has length 417 [2020-07-20 23:03:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:03:59,926 INFO L479 AbstractCegarLoop]: Abstraction has 227209 states and 376792 transitions. [2020-07-20 23:03:59,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:03:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 227209 states and 376792 transitions. [2020-07-20 23:03:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 23:03:59,989 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:03:59,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:00,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:00,203 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:00,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash 312799544, now seen corresponding path program 1 times [2020-07-20 23:04:00,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:00,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672294386] [2020-07-20 23:04:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:00,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:00,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:00,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:00,939 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 23:04:00,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:00,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672294386] [2020-07-20 23:04:00,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:00,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:00,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852739525] [2020-07-20 23:04:00,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:00,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:00,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:00,941 INFO L87 Difference]: Start difference. First operand 227209 states and 376792 transitions. Second operand 4 states. [2020-07-20 23:04:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:20,805 INFO L93 Difference]: Finished difference Result 673937 states and 1117884 transitions. [2020-07-20 23:04:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:04:20,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 23:04:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:21,539 INFO L225 Difference]: With dead ends: 673937 [2020-07-20 23:04:21,539 INFO L226 Difference]: Without dead ends: 447461 [2020-07-20 23:04:21,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447461 states. [2020-07-20 23:04:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447461 to 447457. [2020-07-20 23:04:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447457 states. [2020-07-20 23:04:53,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447457 states to 447457 states and 739760 transitions. [2020-07-20 23:04:53,171 INFO L78 Accepts]: Start accepts. Automaton has 447457 states and 739760 transitions. Word has length 417 [2020-07-20 23:04:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:53,172 INFO L479 AbstractCegarLoop]: Abstraction has 447457 states and 739760 transitions. [2020-07-20 23:04:53,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:04:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 447457 states and 739760 transitions. [2020-07-20 23:04:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 23:04:53,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:53,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:04:53,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:53,468 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash -907607252, now seen corresponding path program 1 times [2020-07-20 23:04:53,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:53,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524773640] [2020-07-20 23:04:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:53,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:53,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:53,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:04:53,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:54,233 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 23:04:54,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:54,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524773640] [2020-07-20 23:04:54,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:54,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:04:54,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898593003] [2020-07-20 23:04:54,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:04:54,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:04:54,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:04:54,235 INFO L87 Difference]: Start difference. First operand 447457 states and 739760 transitions. Second operand 4 states. [2020-07-20 23:05:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:05:46,822 INFO L93 Difference]: Finished difference Result 1328069 states and 2195969 transitions. [2020-07-20 23:05:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:05:46,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-07-20 23:05:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:05:48,901 INFO L225 Difference]: With dead ends: 1328069 [2020-07-20 23:05:48,901 INFO L226 Difference]: Without dead ends: 881857 [2020-07-20 23:05:49,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881857 states. [2020-07-20 23:07:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881857 to 881853. [2020-07-20 23:07:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881853 states. [2020-07-20 23:07:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881853 states to 881853 states and 1453317 transitions. [2020-07-20 23:07:08,530 INFO L78 Accepts]: Start accepts. Automaton has 881853 states and 1453317 transitions. Word has length 418 [2020-07-20 23:07:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:07:08,530 INFO L479 AbstractCegarLoop]: Abstraction has 881853 states and 1453317 transitions. [2020-07-20 23:07:08,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:07:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 881853 states and 1453317 transitions. [2020-07-20 23:07:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 23:07:08,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:07:08,724 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:08,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:08,925 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:07:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:07:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1168748314, now seen corresponding path program 1 times [2020-07-20 23:07:08,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:07:08,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949610496] [2020-07-20 23:07:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:07:09,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:07:09,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:07:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:07:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:07:09,633 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 23:07:09,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:07:09,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949610496] [2020-07-20 23:07:09,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:07:09,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:07:09,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597481597] [2020-07-20 23:07:09,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:07:09,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:07:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:07:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:07:09,635 INFO L87 Difference]: Start difference. First operand 881853 states and 1453317 transitions. Second operand 4 states. [2020-07-20 23:09:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:14,017 INFO L93 Difference]: Finished difference Result 2617269 states and 4314588 transitions. [2020-07-20 23:09:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:09:14,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-07-20 23:09:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:16,960 INFO L225 Difference]: With dead ends: 2617269 [2020-07-20 23:09:16,960 INFO L226 Difference]: Without dead ends: 1736125 [2020-07-20 23:09:17,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:09:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736125 states.