/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 BIGGEST_EQUIVALENCE_CLASS --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_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:23:59,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:23:59,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:23:59,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:23:59,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:23:59,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:23:59,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:23:59,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:23:59,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:23:59,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:23:59,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:23:59,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:23:59,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:23:59,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:23:59,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:23:59,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:23:59,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:23:59,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:23:59,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:23:59,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:23:59,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:23:59,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:23:59,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:23:59,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:23:59,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:23:59,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:23:59,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:23:59,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:23:59,252 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 [2020-07-21 02:23:59,267 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:23:59,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:23:59,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:23:59,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:23:59,269 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:23:59,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:23:59,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:23:59,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:23:59,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:23:59,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:23:59,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:23:59,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:23:59,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:23:59,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:23:59,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:23:59,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:23:59,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:23:59,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:23:59,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:23:59,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:23:59,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:23:59,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:23:59,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:23:59,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:23:59,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:23:59,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:23:59,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:59,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:23:59,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:23:59,273 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:23:59,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:23:59,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:23:59,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:23:59,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:23:59,620 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:23:59,620 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 02:23:59,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c74104a/b9fbf8ec22f94a9eb518fa0ed88303ca/FLAGf1e4ff37d [2020-07-21 02:24:00,314 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:24:00,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 02:24:00,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c74104a/b9fbf8ec22f94a9eb518fa0ed88303ca/FLAGf1e4ff37d [2020-07-21 02:24:00,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c74104a/b9fbf8ec22f94a9eb518fa0ed88303ca [2020-07-21 02:24:00,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:24:00,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:24:00,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:24:00,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:24:00,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:24:00,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:24:00" (1/1) ... [2020-07-21 02:24:00,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e930e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:00, skipping insertion in model container [2020-07-21 02:24:00,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:24:00" (1/1) ... [2020-07-21 02:24:00,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:24:00,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:24:01,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:24:01,612 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:24:02,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:24:02,212 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:24:02,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02 WrapperNode [2020-07-21 02:24:02,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:24:02,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:24:02,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:24:02,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:24:02,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (1/1) ... [2020-07-21 02:24:02,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (1/1) ... [2020-07-21 02:24:02,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (1/1) ... [2020-07-21 02:24:02,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (1/1) ... [2020-07-21 02:24:02,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (1/1) ... [2020-07-21 02:24:02,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (1/1) ... [2020-07-21 02:24:02,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (1/1) ... [2020-07-21 02:24:02,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:24:02,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:24:02,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:24:02,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:24:02,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (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 [2020-07-21 02:24:02,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:24:02,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:24:02,494 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:24:02,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:24:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:24:02,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:24:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:24:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:24:02,496 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:24:02,497 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:24:02,498 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:24:02,498 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:24:02,498 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:24:02,499 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:24:02,499 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:24:02,500 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:24:02,501 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:24:02,501 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:24:02,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:24:02,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:24:02,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:24:05,370 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:24:05,370 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:24:05,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:24:05 BoogieIcfgContainer [2020-07-21 02:24:05,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:24:05,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:24:05,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:24:05,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:24:05,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:24:00" (1/3) ... [2020-07-21 02:24:05,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675e19ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:24:05, skipping insertion in model container [2020-07-21 02:24:05,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:24:02" (2/3) ... [2020-07-21 02:24:05,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675e19ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:24:05, skipping insertion in model container [2020-07-21 02:24:05,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:24:05" (3/3) ... [2020-07-21 02:24:05,390 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 02:24:05,401 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:24:05,411 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:24:05,426 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:24:05,459 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:24:05,459 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:24:05,459 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:24:05,459 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:24:05,460 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:24:05,460 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:24:05,460 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:24:05,460 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:24:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 02:24:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 02:24:05,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:05,521 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] [2020-07-21 02:24:05,522 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 02:24:05,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:05,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135029937] [2020-07-21 02:24:05,543 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 [2020-07-21 02:24:06,074 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:06,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:06,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:06,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135029937] [2020-07-21 02:24:06,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:06,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:06,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139737945] [2020-07-21 02:24:06,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:06,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:06,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:06,397 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 02:24:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:06,832 INFO L93 Difference]: Finished difference Result 2303 states and 4091 transitions. [2020-07-21 02:24:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:24:06,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 02:24:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:06,861 INFO L225 Difference]: With dead ends: 2303 [2020-07-21 02:24:06,862 INFO L226 Difference]: Without dead ends: 1529 [2020-07-21 02:24:06,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2020-07-21 02:24:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1527. [2020-07-21 02:24:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2020-07-21 02:24:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2371 transitions. [2020-07-21 02:24:07,017 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2371 transitions. Word has length 324 [2020-07-21 02:24:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:07,020 INFO L479 AbstractCegarLoop]: Abstraction has 1527 states and 2371 transitions. [2020-07-21 02:24:07,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2371 transitions. [2020-07-21 02:24:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:24:07,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:07,036 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] [2020-07-21 02:24:07,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:07,251 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:07,253 INFO L82 PathProgramCache]: Analyzing trace with hash -348485848, now seen corresponding path program 1 times [2020-07-21 02:24:07,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:07,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389468712] [2020-07-21 02:24:07,255 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 [2020-07-21 02:24:07,631 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:07,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:07,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:07,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:07,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389468712] [2020-07-21 02:24:07,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:07,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:07,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622751267] [2020-07-21 02:24:07,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:07,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:07,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:07,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:07,860 INFO L87 Difference]: Start difference. First operand 1527 states and 2371 transitions. Second operand 3 states. [2020-07-21 02:24:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:08,030 INFO L93 Difference]: Finished difference Result 4375 states and 6762 transitions. [2020-07-21 02:24:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:08,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 02:24:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:08,046 INFO L225 Difference]: With dead ends: 4375 [2020-07-21 02:24:08,047 INFO L226 Difference]: Without dead ends: 2935 [2020-07-21 02:24:08,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2020-07-21 02:24:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2933. [2020-07-21 02:24:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-07-21 02:24:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4519 transitions. [2020-07-21 02:24:08,165 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4519 transitions. Word has length 326 [2020-07-21 02:24:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:08,166 INFO L479 AbstractCegarLoop]: Abstraction has 2933 states and 4519 transitions. [2020-07-21 02:24:08,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4519 transitions. [2020-07-21 02:24:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:24:08,176 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:08,176 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] [2020-07-21 02:24:08,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:08,392 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:08,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1549040403, now seen corresponding path program 1 times [2020-07-21 02:24:08,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:08,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200697822] [2020-07-21 02:24:08,395 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 [2020-07-21 02:24:08,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:08,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:08,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:08,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:08,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200697822] [2020-07-21 02:24:08,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:08,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:08,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887288270] [2020-07-21 02:24:08,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:08,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:08,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:08,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:08,835 INFO L87 Difference]: Start difference. First operand 2933 states and 4519 transitions. Second operand 3 states. [2020-07-21 02:24:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:09,027 INFO L93 Difference]: Finished difference Result 8702 states and 13391 transitions. [2020-07-21 02:24:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:09,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 02:24:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:09,058 INFO L225 Difference]: With dead ends: 8702 [2020-07-21 02:24:09,058 INFO L226 Difference]: Without dead ends: 5811 [2020-07-21 02:24:09,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2020-07-21 02:24:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 2943. [2020-07-21 02:24:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2943 states. [2020-07-21 02:24:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 4533 transitions. [2020-07-21 02:24:09,299 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 4533 transitions. Word has length 326 [2020-07-21 02:24:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:09,300 INFO L479 AbstractCegarLoop]: Abstraction has 2943 states and 4533 transitions. [2020-07-21 02:24:09,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 4533 transitions. [2020-07-21 02:24:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 02:24:09,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:09,310 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] [2020-07-21 02:24:09,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:09,524 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1589385571, now seen corresponding path program 1 times [2020-07-21 02:24:09,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:09,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576528940] [2020-07-21 02:24:09,527 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 [2020-07-21 02:24:09,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:09,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:09,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:09,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:09,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576528940] [2020-07-21 02:24:09,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:09,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:09,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644980800] [2020-07-21 02:24:09,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:09,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:09,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:09,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:09,875 INFO L87 Difference]: Start difference. First operand 2943 states and 4533 transitions. Second operand 3 states. [2020-07-21 02:24:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:10,096 INFO L93 Difference]: Finished difference Result 8739 states and 13451 transitions. [2020-07-21 02:24:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:10,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 02:24:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:10,127 INFO L225 Difference]: With dead ends: 8739 [2020-07-21 02:24:10,127 INFO L226 Difference]: Without dead ends: 5840 [2020-07-21 02:24:10,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2020-07-21 02:24:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 2958. [2020-07-21 02:24:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2958 states. [2020-07-21 02:24:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 4554 transitions. [2020-07-21 02:24:10,388 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 4554 transitions. Word has length 327 [2020-07-21 02:24:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:10,389 INFO L479 AbstractCegarLoop]: Abstraction has 2958 states and 4554 transitions. [2020-07-21 02:24:10,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 4554 transitions. [2020-07-21 02:24:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 02:24:10,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:10,404 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] [2020-07-21 02:24:10,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:10,619 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -326688029, now seen corresponding path program 1 times [2020-07-21 02:24:10,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:10,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977329413] [2020-07-21 02:24:10,621 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 [2020-07-21 02:24:10,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:10,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:10,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977329413] [2020-07-21 02:24:10,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:10,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:10,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559673828] [2020-07-21 02:24:10,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:10,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:10,954 INFO L87 Difference]: Start difference. First operand 2958 states and 4554 transitions. Second operand 4 states. [2020-07-21 02:24:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:11,263 INFO L93 Difference]: Finished difference Result 6298 states and 9706 transitions. [2020-07-21 02:24:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:11,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 02:24:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:11,279 INFO L225 Difference]: With dead ends: 6298 [2020-07-21 02:24:11,280 INFO L226 Difference]: Without dead ends: 3357 [2020-07-21 02:24:11,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2020-07-21 02:24:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3025. [2020-07-21 02:24:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3025 states. [2020-07-21 02:24:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4661 transitions. [2020-07-21 02:24:11,411 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4661 transitions. Word has length 328 [2020-07-21 02:24:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:11,411 INFO L479 AbstractCegarLoop]: Abstraction has 3025 states and 4661 transitions. [2020-07-21 02:24:11,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4661 transitions. [2020-07-21 02:24:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 02:24:11,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:11,421 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] [2020-07-21 02:24:11,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:11,636 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:11,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1639482187, now seen corresponding path program 1 times [2020-07-21 02:24:11,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:11,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471032444] [2020-07-21 02:24:11,638 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 [2020-07-21 02:24:11,872 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:11,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:11,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:11,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:11,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471032444] [2020-07-21 02:24:11,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:11,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:11,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055670523] [2020-07-21 02:24:11,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:11,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:11,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:11,956 INFO L87 Difference]: Start difference. First operand 3025 states and 4661 transitions. Second operand 3 states. [2020-07-21 02:24:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:12,189 INFO L93 Difference]: Finished difference Result 9029 states and 13912 transitions. [2020-07-21 02:24:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:12,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 02:24:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:12,237 INFO L225 Difference]: With dead ends: 9029 [2020-07-21 02:24:12,237 INFO L226 Difference]: Without dead ends: 6024 [2020-07-21 02:24:12,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2020-07-21 02:24:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 3032. [2020-07-21 02:24:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3032 states. [2020-07-21 02:24:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3032 states to 3032 states and 4671 transitions. [2020-07-21 02:24:12,530 INFO L78 Accepts]: Start accepts. Automaton has 3032 states and 4671 transitions. Word has length 330 [2020-07-21 02:24:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:12,530 INFO L479 AbstractCegarLoop]: Abstraction has 3032 states and 4671 transitions. [2020-07-21 02:24:12,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3032 states and 4671 transitions. [2020-07-21 02:24:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 02:24:12,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:12,541 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] [2020-07-21 02:24:12,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:12,754 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:12,755 INFO L82 PathProgramCache]: Analyzing trace with hash -920947079, now seen corresponding path program 1 times [2020-07-21 02:24:12,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:12,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133431100] [2020-07-21 02:24:12,756 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 [2020-07-21 02:24:13,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:13,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:13,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:13,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:13,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133431100] [2020-07-21 02:24:13,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:13,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:13,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251531324] [2020-07-21 02:24:13,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:13,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:13,089 INFO L87 Difference]: Start difference. First operand 3032 states and 4671 transitions. Second operand 3 states. [2020-07-21 02:24:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:13,333 INFO L93 Difference]: Finished difference Result 9057 states and 13954 transitions. [2020-07-21 02:24:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:13,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 02:24:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:13,350 INFO L225 Difference]: With dead ends: 9057 [2020-07-21 02:24:13,350 INFO L226 Difference]: Without dead ends: 6043 [2020-07-21 02:24:13,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2020-07-21 02:24:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 3046. [2020-07-21 02:24:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3046 states. [2020-07-21 02:24:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 4691 transitions. [2020-07-21 02:24:13,522 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 4691 transitions. Word has length 331 [2020-07-21 02:24:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:13,523 INFO L479 AbstractCegarLoop]: Abstraction has 3046 states and 4691 transitions. [2020-07-21 02:24:13,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 4691 transitions. [2020-07-21 02:24:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:24:13,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:13,530 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] [2020-07-21 02:24:13,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:13,745 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 937671629, now seen corresponding path program 1 times [2020-07-21 02:24:13,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:13,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138559728] [2020-07-21 02:24:13,747 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 [2020-07-21 02:24:14,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:14,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:14,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:14,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138559728] [2020-07-21 02:24:14,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:14,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:14,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582507045] [2020-07-21 02:24:14,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:14,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:14,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:14,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:14,178 INFO L87 Difference]: Start difference. First operand 3046 states and 4691 transitions. Second operand 3 states. [2020-07-21 02:24:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:14,411 INFO L93 Difference]: Finished difference Result 6478 states and 10021 transitions. [2020-07-21 02:24:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:14,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:24:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:14,423 INFO L225 Difference]: With dead ends: 6478 [2020-07-21 02:24:14,423 INFO L226 Difference]: Without dead ends: 4240 [2020-07-21 02:24:14,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2020-07-21 02:24:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3550. [2020-07-21 02:24:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3550 states. [2020-07-21 02:24:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3550 states to 3550 states and 5519 transitions. [2020-07-21 02:24:14,585 INFO L78 Accepts]: Start accepts. Automaton has 3550 states and 5519 transitions. Word has length 332 [2020-07-21 02:24:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:14,585 INFO L479 AbstractCegarLoop]: Abstraction has 3550 states and 5519 transitions. [2020-07-21 02:24:14,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3550 states and 5519 transitions. [2020-07-21 02:24:14,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:24:14,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:14,593 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] [2020-07-21 02:24:14,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:14,807 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:14,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:14,808 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-21 02:24:14,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:14,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046530140] [2020-07-21 02:24:14,809 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 [2020-07-21 02:24:15,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:15,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:24:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:15,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:15,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046530140] [2020-07-21 02:24:15,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:15,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 02:24:15,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617360894] [2020-07-21 02:24:15,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:24:15,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:24:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:24:15,495 INFO L87 Difference]: Start difference. First operand 3550 states and 5519 transitions. Second operand 8 states. [2020-07-21 02:24:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:17,392 INFO L93 Difference]: Finished difference Result 10083 states and 15833 transitions. [2020-07-21 02:24:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 02:24:17,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 02:24:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:17,412 INFO L225 Difference]: With dead ends: 10083 [2020-07-21 02:24:17,413 INFO L226 Difference]: Without dead ends: 7565 [2020-07-21 02:24:17,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 02:24:17,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7565 states. [2020-07-21 02:24:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7565 to 4923. [2020-07-21 02:24:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4923 states. [2020-07-21 02:24:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 7615 transitions. [2020-07-21 02:24:17,787 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 7615 transitions. Word has length 332 [2020-07-21 02:24:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:17,787 INFO L479 AbstractCegarLoop]: Abstraction has 4923 states and 7615 transitions. [2020-07-21 02:24:17,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:24:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 7615 transitions. [2020-07-21 02:24:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:24:17,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:17,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:18,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:18,008 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1088493216, now seen corresponding path program 1 times [2020-07-21 02:24:18,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:18,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475096652] [2020-07-21 02:24:18,010 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 [2020-07-21 02:24:18,303 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:18,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:18,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:18,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:18,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475096652] [2020-07-21 02:24:18,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:18,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:18,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084477161] [2020-07-21 02:24:18,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:18,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:18,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:18,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:18,392 INFO L87 Difference]: Start difference. First operand 4923 states and 7615 transitions. Second operand 3 states. [2020-07-21 02:24:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:18,696 INFO L93 Difference]: Finished difference Result 10195 states and 15902 transitions. [2020-07-21 02:24:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:18,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:24:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:18,709 INFO L225 Difference]: With dead ends: 10195 [2020-07-21 02:24:18,709 INFO L226 Difference]: Without dead ends: 6154 [2020-07-21 02:24:18,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6154 states. [2020-07-21 02:24:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6154 to 5800. [2020-07-21 02:24:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5800 states. [2020-07-21 02:24:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5800 states to 5800 states and 9056 transitions. [2020-07-21 02:24:19,118 INFO L78 Accepts]: Start accepts. Automaton has 5800 states and 9056 transitions. Word has length 332 [2020-07-21 02:24:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:19,119 INFO L479 AbstractCegarLoop]: Abstraction has 5800 states and 9056 transitions. [2020-07-21 02:24:19,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5800 states and 9056 transitions. [2020-07-21 02:24:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:24:19,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:19,126 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] [2020-07-21 02:24:19,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:19,340 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash -276487765, now seen corresponding path program 1 times [2020-07-21 02:24:19,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:19,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189051408] [2020-07-21 02:24:19,342 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 [2020-07-21 02:24:19,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:19,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:19,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:19,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189051408] [2020-07-21 02:24:19,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:19,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:19,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694592702] [2020-07-21 02:24:19,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:19,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:19,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:19,735 INFO L87 Difference]: Start difference. First operand 5800 states and 9056 transitions. Second operand 3 states. [2020-07-21 02:24:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:20,269 INFO L93 Difference]: Finished difference Result 16770 states and 26142 transitions. [2020-07-21 02:24:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:20,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:24:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:20,292 INFO L225 Difference]: With dead ends: 16770 [2020-07-21 02:24:20,292 INFO L226 Difference]: Without dead ends: 11208 [2020-07-21 02:24:20,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2020-07-21 02:24:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 11206. [2020-07-21 02:24:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11206 states. [2020-07-21 02:24:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11206 states to 11206 states and 17386 transitions. [2020-07-21 02:24:21,093 INFO L78 Accepts]: Start accepts. Automaton has 11206 states and 17386 transitions. Word has length 332 [2020-07-21 02:24:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:21,094 INFO L479 AbstractCegarLoop]: Abstraction has 11206 states and 17386 transitions. [2020-07-21 02:24:21,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 11206 states and 17386 transitions. [2020-07-21 02:24:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:24:21,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:21,105 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] [2020-07-21 02:24:21,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:21,320 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:21,321 INFO L82 PathProgramCache]: Analyzing trace with hash -485032027, now seen corresponding path program 1 times [2020-07-21 02:24:21,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:21,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589599251] [2020-07-21 02:24:21,322 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 [2020-07-21 02:24:21,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:21,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:24:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:21,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:21,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589599251] [2020-07-21 02:24:21,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:21,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:21,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783615311] [2020-07-21 02:24:21,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:21,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:21,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:21,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:21,657 INFO L87 Difference]: Start difference. First operand 11206 states and 17386 transitions. Second operand 4 states. [2020-07-21 02:24:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:23,226 INFO L93 Difference]: Finished difference Result 31817 states and 49237 transitions. [2020-07-21 02:24:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:23,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 02:24:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:23,274 INFO L225 Difference]: With dead ends: 31817 [2020-07-21 02:24:23,274 INFO L226 Difference]: Without dead ends: 21128 [2020-07-21 02:24:23,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21128 states. [2020-07-21 02:24:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21128 to 11450. [2020-07-21 02:24:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11450 states. [2020-07-21 02:24:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11450 states to 11450 states and 17800 transitions. [2020-07-21 02:24:24,632 INFO L78 Accepts]: Start accepts. Automaton has 11450 states and 17800 transitions. Word has length 332 [2020-07-21 02:24:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:24,632 INFO L479 AbstractCegarLoop]: Abstraction has 11450 states and 17800 transitions. [2020-07-21 02:24:24,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 11450 states and 17800 transitions. [2020-07-21 02:24:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:24:24,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:24,643 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] [2020-07-21 02:24:24,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:24,858 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash -815790061, now seen corresponding path program 1 times [2020-07-21 02:24:24,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:24,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204294683] [2020-07-21 02:24:24,860 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 [2020-07-21 02:24:25,118 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:25,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:25,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:25,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:25,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204294683] [2020-07-21 02:24:25,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:25,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:25,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975263774] [2020-07-21 02:24:25,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:25,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:25,199 INFO L87 Difference]: Start difference. First operand 11450 states and 17800 transitions. Second operand 3 states. [2020-07-21 02:24:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:26,199 INFO L93 Difference]: Finished difference Result 32834 states and 50774 transitions. [2020-07-21 02:24:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:26,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 02:24:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:26,236 INFO L225 Difference]: With dead ends: 32834 [2020-07-21 02:24:26,236 INFO L226 Difference]: Without dead ends: 22155 [2020-07-21 02:24:26,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22155 states. [2020-07-21 02:24:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22155 to 11549. [2020-07-21 02:24:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 02:24:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17934 transitions. [2020-07-21 02:24:26,893 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17934 transitions. Word has length 334 [2020-07-21 02:24:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:26,893 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17934 transitions. [2020-07-21 02:24:26,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17934 transitions. [2020-07-21 02:24:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 02:24:26,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:26,902 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] [2020-07-21 02:24:27,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:27,103 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1417835857, now seen corresponding path program 1 times [2020-07-21 02:24:27,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:27,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38148767] [2020-07-21 02:24:27,106 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 [2020-07-21 02:24:27,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:27,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:27,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:27,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:27,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:27,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38148767] [2020-07-21 02:24:27,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:27,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:24:27,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224485154] [2020-07-21 02:24:27,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:24:27,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:24:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:27,593 INFO L87 Difference]: Start difference. First operand 11549 states and 17934 transitions. Second operand 5 states. [2020-07-21 02:24:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:28,506 INFO L93 Difference]: Finished difference Result 21275 states and 33033 transitions. [2020-07-21 02:24:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:24:28,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-07-21 02:24:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:28,533 INFO L225 Difference]: With dead ends: 21275 [2020-07-21 02:24:28,533 INFO L226 Difference]: Without dead ends: 11549 [2020-07-21 02:24:28,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:24:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11549 states. [2020-07-21 02:24:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11549 to 11549. [2020-07-21 02:24:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-07-21 02:24:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 17824 transitions. [2020-07-21 02:24:29,238 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 17824 transitions. Word has length 335 [2020-07-21 02:24:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:29,239 INFO L479 AbstractCegarLoop]: Abstraction has 11549 states and 17824 transitions. [2020-07-21 02:24:29,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:24:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 17824 transitions. [2020-07-21 02:24:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 02:24:29,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:29,253 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] [2020-07-21 02:24:29,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:29,467 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash 387279148, now seen corresponding path program 1 times [2020-07-21 02:24:29,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:29,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843577241] [2020-07-21 02:24:29,469 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 [2020-07-21 02:24:29,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:29,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:29,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:29,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:30,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:30,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843577241] [2020-07-21 02:24:30,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:30,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:30,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679255441] [2020-07-21 02:24:30,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:30,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:30,006 INFO L87 Difference]: Start difference. First operand 11549 states and 17824 transitions. Second operand 4 states. [2020-07-21 02:24:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:31,155 INFO L93 Difference]: Finished difference Result 33912 states and 52317 transitions. [2020-07-21 02:24:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:31,156 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-21 02:24:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:31,188 INFO L225 Difference]: With dead ends: 33912 [2020-07-21 02:24:31,189 INFO L226 Difference]: Without dead ends: 22534 [2020-07-21 02:24:31,215 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 [2020-07-21 02:24:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2020-07-21 02:24:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22532. [2020-07-21 02:24:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22532 states. [2020-07-21 02:24:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22532 states to 22532 states and 34549 transitions. [2020-07-21 02:24:32,548 INFO L78 Accepts]: Start accepts. Automaton has 22532 states and 34549 transitions. Word has length 335 [2020-07-21 02:24:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:32,548 INFO L479 AbstractCegarLoop]: Abstraction has 22532 states and 34549 transitions. [2020-07-21 02:24:32,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:32,549 INFO L276 IsEmpty]: Start isEmpty. Operand 22532 states and 34549 transitions. [2020-07-21 02:24:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:24:32,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:32,565 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] [2020-07-21 02:24:32,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:32,766 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:32,767 INFO L82 PathProgramCache]: Analyzing trace with hash 941612388, now seen corresponding path program 1 times [2020-07-21 02:24:32,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:32,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461492102] [2020-07-21 02:24:32,768 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 [2020-07-21 02:24:33,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:33,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:33,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:33,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:33,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461492102] [2020-07-21 02:24:33,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:33,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:33,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534406201] [2020-07-21 02:24:33,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:33,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:33,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:33,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:33,100 INFO L87 Difference]: Start difference. First operand 22532 states and 34549 transitions. Second operand 3 states. [2020-07-21 02:24:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:35,778 INFO L93 Difference]: Finished difference Result 64786 states and 98879 transitions. [2020-07-21 02:24:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:35,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 02:24:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:35,831 INFO L225 Difference]: With dead ends: 64786 [2020-07-21 02:24:35,832 INFO L226 Difference]: Without dead ends: 43632 [2020-07-21 02:24:35,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:35,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43632 states. [2020-07-21 02:24:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43632 to 22748. [2020-07-21 02:24:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22748 states. [2020-07-21 02:24:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22748 states to 22748 states and 34830 transitions. [2020-07-21 02:24:37,202 INFO L78 Accepts]: Start accepts. Automaton has 22748 states and 34830 transitions. Word has length 336 [2020-07-21 02:24:37,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:37,203 INFO L479 AbstractCegarLoop]: Abstraction has 22748 states and 34830 transitions. [2020-07-21 02:24:37,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:37,203 INFO L276 IsEmpty]: Start isEmpty. Operand 22748 states and 34830 transitions. [2020-07-21 02:24:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 02:24:37,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:37,218 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] [2020-07-21 02:24:37,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:37,431 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:37,432 INFO L82 PathProgramCache]: Analyzing trace with hash 943899740, now seen corresponding path program 1 times [2020-07-21 02:24:37,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:37,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137880117] [2020-07-21 02:24:37,433 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 [2020-07-21 02:24:37,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1487 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:38,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137880117] [2020-07-21 02:24:38,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:38,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:38,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444933631] [2020-07-21 02:24:38,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:38,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:38,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:38,121 INFO L87 Difference]: Start difference. First operand 22748 states and 34830 transitions. Second operand 3 states. [2020-07-21 02:24:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:41,187 INFO L93 Difference]: Finished difference Result 66265 states and 101191 transitions. [2020-07-21 02:24:41,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:41,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 02:24:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:41,232 INFO L225 Difference]: With dead ends: 66265 [2020-07-21 02:24:41,232 INFO L226 Difference]: Without dead ends: 44623 [2020-07-21 02:24:41,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44623 states. [2020-07-21 02:24:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44623 to 44621. [2020-07-21 02:24:43,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44621 states. [2020-07-21 02:24:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44621 states to 44621 states and 67842 transitions. [2020-07-21 02:24:43,848 INFO L78 Accepts]: Start accepts. Automaton has 44621 states and 67842 transitions. Word has length 337 [2020-07-21 02:24:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:43,849 INFO L479 AbstractCegarLoop]: Abstraction has 44621 states and 67842 transitions. [2020-07-21 02:24:43,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 44621 states and 67842 transitions. [2020-07-21 02:24:43,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:24:43,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:43,867 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] [2020-07-21 02:24:44,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:44,068 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash -76537344, now seen corresponding path program 1 times [2020-07-21 02:24:44,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:44,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048763123] [2020-07-21 02:24:44,071 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 [2020-07-21 02:24:44,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:44,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:44,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:24:44,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:44,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:44,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048763123] [2020-07-21 02:24:44,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:44,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:44,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324547474] [2020-07-21 02:24:44,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:44,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:44,414 INFO L87 Difference]: Start difference. First operand 44621 states and 67842 transitions. Second operand 4 states. [2020-07-21 02:24:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:50,631 INFO L93 Difference]: Finished difference Result 130210 states and 197637 transitions. [2020-07-21 02:24:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:50,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 02:24:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:50,738 INFO L225 Difference]: With dead ends: 130210 [2020-07-21 02:24:50,738 INFO L226 Difference]: Without dead ends: 88718 [2020-07-21 02:24:50,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88718 states. [2020-07-21 02:24:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88718 to 47676. [2020-07-21 02:24:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 02:24:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72745 transitions. [2020-07-21 02:24:53,923 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72745 transitions. Word has length 338 [2020-07-21 02:24:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:53,923 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72745 transitions. [2020-07-21 02:24:53,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72745 transitions. [2020-07-21 02:24:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:24:53,955 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:53,955 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] [2020-07-21 02:24:54,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:54,156 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1346166825, now seen corresponding path program 1 times [2020-07-21 02:24:54,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:54,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695854023] [2020-07-21 02:24:54,158 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 [2020-07-21 02:24:54,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:54,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:54,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:54,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:54,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695854023] [2020-07-21 02:24:54,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:54,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:54,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770881271] [2020-07-21 02:24:54,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:54,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:54,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:54,477 INFO L87 Difference]: Start difference. First operand 47676 states and 72745 transitions. Second operand 3 states. [2020-07-21 02:24:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:59,720 INFO L93 Difference]: Finished difference Result 91758 states and 139339 transitions. [2020-07-21 02:24:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:59,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 02:24:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:59,785 INFO L225 Difference]: With dead ends: 91758 [2020-07-21 02:24:59,785 INFO L226 Difference]: Without dead ends: 69260 [2020-07-21 02:24:59,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69260 states. [2020-07-21 02:25:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69260 to 47676. [2020-07-21 02:25:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47676 states. [2020-07-21 02:25:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47676 states to 47676 states and 72738 transitions. [2020-07-21 02:25:02,844 INFO L78 Accepts]: Start accepts. Automaton has 47676 states and 72738 transitions. Word has length 338 [2020-07-21 02:25:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:02,845 INFO L479 AbstractCegarLoop]: Abstraction has 47676 states and 72738 transitions. [2020-07-21 02:25:02,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:25:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 47676 states and 72738 transitions. [2020-07-21 02:25:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:25:02,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:02,876 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] [2020-07-21 02:25:03,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:03,090 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1790781151, now seen corresponding path program 1 times [2020-07-21 02:25:03,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:03,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281671795] [2020-07-21 02:25:03,092 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 [2020-07-21 02:25:03,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:03,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:03,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:25:03,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:03,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:03,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281671795] [2020-07-21 02:25:03,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:03,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:25:03,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952670673] [2020-07-21 02:25:03,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:25:03,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:25:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:25:03,402 INFO L87 Difference]: Start difference. First operand 47676 states and 72738 transitions. Second operand 4 states. [2020-07-21 02:25:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:08,916 INFO L93 Difference]: Finished difference Result 128367 states and 194760 transitions. [2020-07-21 02:25:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:25:08,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 02:25:08,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:09,010 INFO L225 Difference]: With dead ends: 128367 [2020-07-21 02:25:09,010 INFO L226 Difference]: Without dead ends: 86453 [2020-07-21 02:25:09,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:25:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86453 states. [2020-07-21 02:25:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86453 to 50226. [2020-07-21 02:25:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50226 states. [2020-07-21 02:25:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50226 states to 50226 states and 76627 transitions. [2020-07-21 02:25:14,248 INFO L78 Accepts]: Start accepts. Automaton has 50226 states and 76627 transitions. Word has length 338 [2020-07-21 02:25:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:14,248 INFO L479 AbstractCegarLoop]: Abstraction has 50226 states and 76627 transitions. [2020-07-21 02:25:14,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:25:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 50226 states and 76627 transitions. [2020-07-21 02:25:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 02:25:14,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:14,275 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] [2020-07-21 02:25:14,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:14,476 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:14,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2145516863, now seen corresponding path program 1 times [2020-07-21 02:25:14,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:14,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538605836] [2020-07-21 02:25:14,478 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 [2020-07-21 02:25:14,731 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:14,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:14,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:25:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:14,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:14,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538605836] [2020-07-21 02:25:14,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:14,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:25:14,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829370455] [2020-07-21 02:25:14,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:25:14,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:14,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:25:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:25:14,797 INFO L87 Difference]: Start difference. First operand 50226 states and 76627 transitions. Second operand 4 states. [2020-07-21 02:25:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:18,518 INFO L93 Difference]: Finished difference Result 107141 states and 163193 transitions. [2020-07-21 02:25:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:25:18,518 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 02:25:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:18,583 INFO L225 Difference]: With dead ends: 107141 [2020-07-21 02:25:18,584 INFO L226 Difference]: Without dead ends: 54023 [2020-07-21 02:25:18,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:25:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54023 states. [2020-07-21 02:25:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54023 to 54017. [2020-07-21 02:25:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54017 states. [2020-07-21 02:25:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54017 states to 54017 states and 81808 transitions. [2020-07-21 02:25:22,602 INFO L78 Accepts]: Start accepts. Automaton has 54017 states and 81808 transitions. Word has length 339 [2020-07-21 02:25:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:22,602 INFO L479 AbstractCegarLoop]: Abstraction has 54017 states and 81808 transitions. [2020-07-21 02:25:22,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:25:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 54017 states and 81808 transitions. [2020-07-21 02:25:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 02:25:22,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:22,635 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] [2020-07-21 02:25:22,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:22,836 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1897326802, now seen corresponding path program 1 times [2020-07-21 02:25:22,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:22,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464399506] [2020-07-21 02:25:22,840 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:23,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:23,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:23,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:25:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:23,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:23,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464399506] [2020-07-21 02:25:23,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:23,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:25:23,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568978200] [2020-07-21 02:25:23,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:25:23,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:25:23,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:25:23,132 INFO L87 Difference]: Start difference. First operand 54017 states and 81808 transitions. Second operand 4 states. [2020-07-21 02:25:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:30,348 INFO L93 Difference]: Finished difference Result 138860 states and 208961 transitions. [2020-07-21 02:25:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:25:30,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 02:25:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:30,471 INFO L225 Difference]: With dead ends: 138860 [2020-07-21 02:25:30,472 INFO L226 Difference]: Without dead ends: 96158 [2020-07-21 02:25:30,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:25:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96158 states. [2020-07-21 02:25:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96158 to 57651. [2020-07-21 02:25:34,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57651 states. [2020-07-21 02:25:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57651 states to 57651 states and 87465 transitions. [2020-07-21 02:25:34,897 INFO L78 Accepts]: Start accepts. Automaton has 57651 states and 87465 transitions. Word has length 340 [2020-07-21 02:25:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:34,897 INFO L479 AbstractCegarLoop]: Abstraction has 57651 states and 87465 transitions. [2020-07-21 02:25:34,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:25:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 57651 states and 87465 transitions. [2020-07-21 02:25:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 02:25:34,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:34,930 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] [2020-07-21 02:25:35,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:35,131 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:35,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1775562027, now seen corresponding path program 1 times [2020-07-21 02:25:35,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:35,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944664158] [2020-07-21 02:25:35,133 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:35,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:25:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:35,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:35,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944664158] [2020-07-21 02:25:35,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:35,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:35,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579534658] [2020-07-21 02:25:35,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:35,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:35,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:35,530 INFO L87 Difference]: Start difference. First operand 57651 states and 87465 transitions. Second operand 3 states. [2020-07-21 02:25:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:42,863 INFO L93 Difference]: Finished difference Result 157308 states and 237515 transitions. [2020-07-21 02:25:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:25:42,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 02:25:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:42,995 INFO L225 Difference]: With dead ends: 157308 [2020-07-21 02:25:42,996 INFO L226 Difference]: Without dead ends: 110298 [2020-07-21 02:25:43,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:43,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110298 states. [2020-07-21 02:25:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110298 to 110296. [2020-07-21 02:25:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110296 states. [2020-07-21 02:25:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110296 states to 110296 states and 166081 transitions. [2020-07-21 02:25:52,667 INFO L78 Accepts]: Start accepts. Automaton has 110296 states and 166081 transitions. Word has length 341 [2020-07-21 02:25:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:52,667 INFO L479 AbstractCegarLoop]: Abstraction has 110296 states and 166081 transitions. [2020-07-21 02:25:52,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:25:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 110296 states and 166081 transitions. [2020-07-21 02:25:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:25:52,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:52,724 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] [2020-07-21 02:25:52,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:52,925 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 572764343, now seen corresponding path program 1 times [2020-07-21 02:25:52,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:52,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044828564] [2020-07-21 02:25:52,927 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:53,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:53,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:53,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:53,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:53,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044828564] [2020-07-21 02:25:53,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:53,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:53,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756077200] [2020-07-21 02:25:53,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:53,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:53,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:53,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:53,479 INFO L87 Difference]: Start difference. First operand 110296 states and 166081 transitions. Second operand 3 states. [2020-07-21 02:26:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:08,742 INFO L93 Difference]: Finished difference Result 277644 states and 414967 transitions. [2020-07-21 02:26:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:26:08,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 02:26:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:08,971 INFO L225 Difference]: With dead ends: 277644 [2020-07-21 02:26:08,972 INFO L226 Difference]: Without dead ends: 194066 [2020-07-21 02:26:09,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:26:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194066 states. [2020-07-21 02:26:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194066 to 111376. [2020-07-21 02:26:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111376 states. [2020-07-21 02:26:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111376 states to 111376 states and 167501 transitions. [2020-07-21 02:26:18,298 INFO L78 Accepts]: Start accepts. Automaton has 111376 states and 167501 transitions. Word has length 342 [2020-07-21 02:26:18,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:26:18,299 INFO L479 AbstractCegarLoop]: Abstraction has 111376 states and 167501 transitions. [2020-07-21 02:26:18,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:26:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 111376 states and 167501 transitions. [2020-07-21 02:26:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:26:18,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:26:18,358 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] [2020-07-21 02:26:18,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:18,559 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:26:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:26:18,560 INFO L82 PathProgramCache]: Analyzing trace with hash -465543073, now seen corresponding path program 1 times [2020-07-21 02:26:18,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:26:18,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937414440] [2020-07-21 02:26:18,561 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:18,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:26:18,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:26:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:26:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:26:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:26:18,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:26:18,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937414440] [2020-07-21 02:26:18,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:26:18,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:26:18,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054559087] [2020-07-21 02:26:18,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:26:18,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:26:18,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:26:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:26:18,869 INFO L87 Difference]: Start difference. First operand 111376 states and 167501 transitions. Second operand 4 states. [2020-07-21 02:26:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:31,133 INFO L93 Difference]: Finished difference Result 197073 states and 295844 transitions. [2020-07-21 02:26:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:26:31,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-07-21 02:26:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:31,319 INFO L225 Difference]: With dead ends: 197073 [2020-07-21 02:26:31,320 INFO L226 Difference]: Without dead ends: 157505 [2020-07-21 02:26:31,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:26:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157505 states. [2020-07-21 02:26:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157505 to 119017. [2020-07-21 02:26:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119017 states. [2020-07-21 02:26:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119017 states to 119017 states and 179222 transitions. [2020-07-21 02:26:40,842 INFO L78 Accepts]: Start accepts. Automaton has 119017 states and 179222 transitions. Word has length 342 [2020-07-21 02:26:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:26:40,842 INFO L479 AbstractCegarLoop]: Abstraction has 119017 states and 179222 transitions. [2020-07-21 02:26:40,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:26:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 119017 states and 179222 transitions. [2020-07-21 02:26:40,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:26:40,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:26:40,912 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] [2020-07-21 02:26:41,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:41,121 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:26:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:26:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1125984775, now seen corresponding path program 1 times [2020-07-21 02:26:41,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:26:41,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776002906] [2020-07-21 02:26:41,123 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:41,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:26:41,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:26:41,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:26:41,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:26:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:26:41,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:26:41,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776002906] [2020-07-21 02:26:41,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:26:41,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:26:41,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873476151] [2020-07-21 02:26:41,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:26:41,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:26:41,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:26:41,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:26:41,479 INFO L87 Difference]: Start difference. First operand 119017 states and 179222 transitions. Second operand 4 states. [2020-07-21 02:26:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:53,950 INFO L93 Difference]: Finished difference Result 261484 states and 389159 transitions. [2020-07-21 02:26:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:26:53,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-21 02:26:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:54,103 INFO L225 Difference]: With dead ends: 261484 [2020-07-21 02:26:54,104 INFO L226 Difference]: Without dead ends: 133933 [2020-07-21 02:26:54,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:26:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133933 states. [2020-07-21 02:27:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133933 to 133931. [2020-07-21 02:27:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133931 states. [2020-07-21 02:27:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133931 states to 133931 states and 197598 transitions. [2020-07-21 02:27:07,205 INFO L78 Accepts]: Start accepts. Automaton has 133931 states and 197598 transitions. Word has length 343 [2020-07-21 02:27:07,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:07,205 INFO L479 AbstractCegarLoop]: Abstraction has 133931 states and 197598 transitions. [2020-07-21 02:27:07,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:27:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 133931 states and 197598 transitions. [2020-07-21 02:27:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:27:07,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:07,287 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] [2020-07-21 02:27:07,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:07,487 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:07,488 INFO L82 PathProgramCache]: Analyzing trace with hash 332815650, now seen corresponding path program 1 times [2020-07-21 02:27:07,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:07,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610889992] [2020-07-21 02:27:07,489 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:07,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:07,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:07,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610889992] [2020-07-21 02:27:07,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:07,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:07,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673127518] [2020-07-21 02:27:07,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:07,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:07,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:07,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:07,811 INFO L87 Difference]: Start difference. First operand 133931 states and 197598 transitions. Second operand 3 states. [2020-07-21 02:27:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:25,310 INFO L93 Difference]: Finished difference Result 351341 states and 517927 transitions. [2020-07-21 02:27:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:25,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 02:27:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:25,586 INFO L225 Difference]: With dead ends: 351341 [2020-07-21 02:27:25,586 INFO L226 Difference]: Without dead ends: 230235 [2020-07-21 02:27:25,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230235 states. [2020-07-21 02:27:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230235 to 129579. [2020-07-21 02:27:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129579 states. [2020-07-21 02:27:41,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129579 states to 129579 states and 191067 transitions. [2020-07-21 02:27:41,124 INFO L78 Accepts]: Start accepts. Automaton has 129579 states and 191067 transitions. Word has length 343 [2020-07-21 02:27:41,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:41,125 INFO L479 AbstractCegarLoop]: Abstraction has 129579 states and 191067 transitions. [2020-07-21 02:27:41,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:27:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 129579 states and 191067 transitions. [2020-07-21 02:27:41,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:27:41,201 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:41,201 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] [2020-07-21 02:27:41,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:41,402 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash -481817221, now seen corresponding path program 1 times [2020-07-21 02:27:41,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:41,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738923323] [2020-07-21 02:27:41,404 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:41,653 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:41,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:41,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:41,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:41,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738923323] [2020-07-21 02:27:41,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:41,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:41,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18347397] [2020-07-21 02:27:41,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:41,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:41,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:41,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:41,726 INFO L87 Difference]: Start difference. First operand 129579 states and 191067 transitions. Second operand 3 states. [2020-07-21 02:27:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:58,811 INFO L93 Difference]: Finished difference Result 312449 states and 459918 transitions. [2020-07-21 02:27:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:27:58,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 02:27:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:59,088 INFO L225 Difference]: With dead ends: 312449 [2020-07-21 02:27:59,088 INFO L226 Difference]: Without dead ends: 220857 [2020-07-21 02:27:59,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:59,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220857 states. [2020-07-21 02:28:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220857 to 131539. [2020-07-21 02:28:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131539 states. [2020-07-21 02:28:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131539 states to 131539 states and 193649 transitions. [2020-07-21 02:28:15,674 INFO L78 Accepts]: Start accepts. Automaton has 131539 states and 193649 transitions. Word has length 343 [2020-07-21 02:28:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:15,674 INFO L479 AbstractCegarLoop]: Abstraction has 131539 states and 193649 transitions. [2020-07-21 02:28:15,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:28:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 131539 states and 193649 transitions. [2020-07-21 02:28:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 02:28:15,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:15,757 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] [2020-07-21 02:28:15,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:15,964 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash 276113738, now seen corresponding path program 1 times [2020-07-21 02:28:15,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:15,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18448870] [2020-07-21 02:28:15,966 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:16,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:28:16,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:16,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:28:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:16,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:16,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18448870] [2020-07-21 02:28:16,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:16,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:16,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083995854] [2020-07-21 02:28:16,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:16,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:16,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:16,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:16,319 INFO L87 Difference]: Start difference. First operand 131539 states and 193649 transitions. Second operand 4 states. [2020-07-21 02:28:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:28,567 INFO L93 Difference]: Finished difference Result 287581 states and 421597 transitions. [2020-07-21 02:28:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:28:28,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 02:28:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:28,733 INFO L225 Difference]: With dead ends: 287581 [2020-07-21 02:28:28,733 INFO L226 Difference]: Without dead ends: 138816 [2020-07-21 02:28:28,829 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 [2020-07-21 02:28:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138816 states. [2020-07-21 02:28:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138816 to 138814. [2020-07-21 02:28:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138814 states. [2020-07-21 02:28:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138814 states to 138814 states and 202614 transitions. [2020-07-21 02:28:40,828 INFO L78 Accepts]: Start accepts. Automaton has 138814 states and 202614 transitions. Word has length 344 [2020-07-21 02:28:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:40,829 INFO L479 AbstractCegarLoop]: Abstraction has 138814 states and 202614 transitions. [2020-07-21 02:28:40,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 138814 states and 202614 transitions. [2020-07-21 02:28:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 02:28:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:40,947 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] [2020-07-21 02:28:41,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:41,148 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1076892410, now seen corresponding path program 1 times [2020-07-21 02:28:41,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:41,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894073750] [2020-07-21 02:28:41,150 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:41,454 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:41,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:28:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:41,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:41,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894073750] [2020-07-21 02:28:41,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:41,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:28:41,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26378000] [2020-07-21 02:28:41,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:28:41,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:41,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:28:41,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:28:41,553 INFO L87 Difference]: Start difference. First operand 138814 states and 202614 transitions. Second operand 4 states. [2020-07-21 02:29:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:04,242 INFO L93 Difference]: Finished difference Result 391421 states and 569935 transitions. [2020-07-21 02:29:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:29:04,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 02:29:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:04,579 INFO L225 Difference]: With dead ends: 391421 [2020-07-21 02:29:04,580 INFO L226 Difference]: Without dead ends: 256069 [2020-07-21 02:29:04,699 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 [2020-07-21 02:29:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256069 states. [2020-07-21 02:29:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256069 to 256067. [2020-07-21 02:29:31,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256067 states. [2020-07-21 02:29:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256067 states to 256067 states and 370603 transitions. [2020-07-21 02:29:32,016 INFO L78 Accepts]: Start accepts. Automaton has 256067 states and 370603 transitions. Word has length 344 [2020-07-21 02:29:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:29:32,016 INFO L479 AbstractCegarLoop]: Abstraction has 256067 states and 370603 transitions. [2020-07-21 02:29:32,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:29:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 256067 states and 370603 transitions. [2020-07-21 02:29:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 02:29:32,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:29:32,184 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] [2020-07-21 02:29:32,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:32,398 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:29:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:29:32,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1852880630, now seen corresponding path program 1 times [2020-07-21 02:29:32,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:29:32,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839952447] [2020-07-21 02:29:32,400 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:29:32,699 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:29:32,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:29:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:29:32,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:29:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:29:32,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:29:32,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839952447] [2020-07-21 02:29:32,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:29:32,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:29:32,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917687288] [2020-07-21 02:29:32,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:29:32,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:29:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:29:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:32,800 INFO L87 Difference]: Start difference. First operand 256067 states and 370603 transitions. Second operand 3 states. [2020-07-21 02:30:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:30:18,499 INFO L93 Difference]: Finished difference Result 691835 states and 998204 transitions. [2020-07-21 02:30:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:30:18,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 02:30:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:30:19,195 INFO L225 Difference]: With dead ends: 691835 [2020-07-21 02:30:19,195 INFO L226 Difference]: Without dead ends: 485407 [2020-07-21 02:30:19,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485407 states. [2020-07-21 02:31:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485407 to 485405. [2020-07-21 02:31:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485405 states. [2020-07-21 02:31:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485405 states to 485405 states and 696622 transitions. [2020-07-21 02:31:11,738 INFO L78 Accepts]: Start accepts. Automaton has 485405 states and 696622 transitions. Word has length 346 [2020-07-21 02:31:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:31:11,738 INFO L479 AbstractCegarLoop]: Abstraction has 485405 states and 696622 transitions. [2020-07-21 02:31:11,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:31:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 485405 states and 696622 transitions. [2020-07-21 02:31:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 02:31:12,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:31:12,132 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] [2020-07-21 02:31:12,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:12,340 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:31:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:31:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1664677053, now seen corresponding path program 1 times [2020-07-21 02:31:12,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:31:12,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846724244] [2020-07-21 02:31:12,342 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:31:12,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:31:12,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:31:12,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:31:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:31:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:31:12,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:31:12,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846724244] [2020-07-21 02:31:12,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:31:12,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:31:12,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847076371] [2020-07-21 02:31:12,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:31:12,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:31:12,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:31:12,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:31:12,668 INFO L87 Difference]: Start difference. First operand 485405 states and 696622 transitions. Second operand 3 states. [2020-07-21 02:32:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:33,630 INFO L93 Difference]: Finished difference Result 1171190 states and 1681978 transitions. [2020-07-21 02:32:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:32:33,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-07-21 02:32:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:34,910 INFO L225 Difference]: With dead ends: 1171190 [2020-07-21 02:32:34,911 INFO L226 Difference]: Without dead ends: 828525 [2020-07-21 02:32:35,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828525 states. [2020-07-21 02:33:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828525 to 493249. [2020-07-21 02:33:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493249 states. [2020-07-21 02:33:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493249 states to 493249 states and 704314 transitions. [2020-07-21 02:33:46,832 INFO L78 Accepts]: Start accepts. Automaton has 493249 states and 704314 transitions. Word has length 347 [2020-07-21 02:33:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:46,833 INFO L479 AbstractCegarLoop]: Abstraction has 493249 states and 704314 transitions. [2020-07-21 02:33:46,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 493249 states and 704314 transitions. [2020-07-21 02:33:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 02:33:47,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:47,248 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] [2020-07-21 02:33:47,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:47,449 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1355375446, now seen corresponding path program 1 times [2020-07-21 02:33:47,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:47,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719781593] [2020-07-21 02:33:47,451 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:47,714 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:33:47,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:33:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:47,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:47,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719781593] [2020-07-21 02:33:47,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:47,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:33:47,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200144803] [2020-07-21 02:33:47,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:33:47,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:33:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:47,775 INFO L87 Difference]: Start difference. First operand 493249 states and 704314 transitions. Second operand 3 states. [2020-07-21 02:35:08,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:35:08,313 INFO L93 Difference]: Finished difference Result 998165 states and 1431307 transitions. [2020-07-21 02:35:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:35:08,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-07-21 02:35:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:35:09,361 INFO L225 Difference]: With dead ends: 998165 [2020-07-21 02:35:09,361 INFO L226 Difference]: Without dead ends: 723095 [2020-07-21 02:35:09,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:35:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723095 states.