/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:17:27,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:17:27,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:17:27,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:17:27,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:17:27,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:17:27,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:17:27,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:17:27,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:17:27,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:17:27,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:17:27,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:17:27,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:17:27,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:17:27,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:17:27,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:17:27,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:17:27,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:17:27,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:17:27,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:17:27,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:17:27,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:17:27,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:17:27,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:17:27,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:17:27,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:17:27,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:17:27,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:17:27,265 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 12:17:27,291 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:17:27,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:17:27,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:17:27,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:17:27,294 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:17:27,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:17:27,294 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:17:27,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:17:27,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:17:27,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:17:27,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:17:27,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:17:27,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:17:27,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:17:27,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:17:27,297 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:17:27,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:17:27,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:17:27,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:17:27,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:17:27,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:17:27,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:17:27,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:17:27,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:17:27,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:17:27,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:17:27,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:27,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:17:27,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:17:27,300 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 -> NOT_INCREMENTALLY [2020-07-21 12:17:27,566 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:17:27,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:17:27,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:17:27,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:17:27,583 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:17:27,584 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 12:17:27,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d615a1ae/3d30c4db904d44658439f1d75d65b026/FLAG4d846383a [2020-07-21 12:17:28,361 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:17:28,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 12:17:28,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d615a1ae/3d30c4db904d44658439f1d75d65b026/FLAG4d846383a [2020-07-21 12:17:28,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d615a1ae/3d30c4db904d44658439f1d75d65b026 [2020-07-21 12:17:28,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:17:28,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:17:28,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:17:28,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:17:28,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:17:28,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:17:28" (1/1) ... [2020-07-21 12:17:28,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e09eb47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:28, skipping insertion in model container [2020-07-21 12:17:28,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:17:28" (1/1) ... [2020-07-21 12:17:28,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:17:28,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:17:30,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:17:30,205 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:17:31,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:17:31,382 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:17:31,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31 WrapperNode [2020-07-21 12:17:31,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:17:31,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:17:31,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:17:31,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:17:31,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:17:31,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:17:31,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:17:31,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:17:31,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (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 12:17:31,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:17:31,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:17:31,692 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:17:31,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:17:31,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:17:31,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:17:31,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:17:31,693 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:17:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:17:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:17:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:17:31,694 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:17:31,695 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:17:31,695 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:17:31,696 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:17:31,696 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:17:31,697 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:17:31,697 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:17:31,697 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:17:31,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:17:31,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:17:31,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:17:35,801 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:17:35,801 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:17:35,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:17:35 BoogieIcfgContainer [2020-07-21 12:17:35,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:17:35,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:17:35,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:17:35,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:17:35,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:17:28" (1/3) ... [2020-07-21 12:17:35,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150e4a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:17:35, skipping insertion in model container [2020-07-21 12:17:35,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (2/3) ... [2020-07-21 12:17:35,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150e4a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:17:35, skipping insertion in model container [2020-07-21 12:17:35,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:17:35" (3/3) ... [2020-07-21 12:17:35,822 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 12:17:35,831 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:17:35,840 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 12:17:35,853 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 12:17:35,881 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:17:35,881 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:17:35,881 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:17:35,881 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:17:35,881 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:17:35,882 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:17:35,882 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:17:35,882 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:17:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-21 12:17:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 12:17:35,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:35,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:35,966 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-21 12:17:35,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:35,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557779527] [2020-07-21 12:17:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:36,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:17:36,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:37,202 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 12:17:37,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:37,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557779527] [2020-07-21 12:17:37,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:37,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:17:37,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929175377] [2020-07-21 12:17:37,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:17:37,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:17:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:17:37,226 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 4 states. [2020-07-21 12:17:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:37,667 INFO L93 Difference]: Finished difference Result 4059 states and 7350 transitions. [2020-07-21 12:17:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:17:37,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 464 [2020-07-21 12:17:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:37,700 INFO L225 Difference]: With dead ends: 4059 [2020-07-21 12:17:37,700 INFO L226 Difference]: Without dead ends: 2697 [2020-07-21 12:17:37,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 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 12:17:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2020-07-21 12:17:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647. [2020-07-21 12:17:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2020-07-21 12:17:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4347 transitions. [2020-07-21 12:17:37,882 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4347 transitions. Word has length 464 [2020-07-21 12:17:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:37,883 INFO L479 AbstractCegarLoop]: Abstraction has 2647 states and 4347 transitions. [2020-07-21 12:17:37,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:17:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4347 transitions. [2020-07-21 12:17:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-21 12:17:37,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:37,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:38,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:38,113 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1286826198, now seen corresponding path program 1 times [2020-07-21 12:17:38,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:38,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141415358] [2020-07-21 12:17:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:38,958 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 12:17:38,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:38,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141415358] [2020-07-21 12:17:38,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:38,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:38,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859023778] [2020-07-21 12:17:38,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:38,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:38,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:38,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:38,963 INFO L87 Difference]: Start difference. First operand 2647 states and 4347 transitions. Second operand 3 states. [2020-07-21 12:17:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:39,347 INFO L93 Difference]: Finished difference Result 7670 states and 12560 transitions. [2020-07-21 12:17:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:39,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 466 [2020-07-21 12:17:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:39,383 INFO L225 Difference]: With dead ends: 7670 [2020-07-21 12:17:39,383 INFO L226 Difference]: Without dead ends: 5237 [2020-07-21 12:17:39,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 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 12:17:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2020-07-21 12:17:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189. [2020-07-21 12:17:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5189 states. [2020-07-21 12:17:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8497 transitions. [2020-07-21 12:17:39,653 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 8497 transitions. Word has length 466 [2020-07-21 12:17:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:39,654 INFO L479 AbstractCegarLoop]: Abstraction has 5189 states and 8497 transitions. [2020-07-21 12:17:39,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 8497 transitions. [2020-07-21 12:17:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 12:17:39,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:39,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:39,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:39,891 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:39,892 INFO L82 PathProgramCache]: Analyzing trace with hash -244647039, now seen corresponding path program 1 times [2020-07-21 12:17:39,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:39,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716317052] [2020-07-21 12:17:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 2957 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:40,764 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 12:17:40,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:40,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716317052] [2020-07-21 12:17:40,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:40,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:40,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793244922] [2020-07-21 12:17:40,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:40,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:40,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:40,768 INFO L87 Difference]: Start difference. First operand 5189 states and 8497 transitions. Second operand 3 states. [2020-07-21 12:17:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:41,081 INFO L93 Difference]: Finished difference Result 15470 states and 25323 transitions. [2020-07-21 12:17:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:41,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-21 12:17:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:41,130 INFO L225 Difference]: With dead ends: 15470 [2020-07-21 12:17:41,130 INFO L226 Difference]: Without dead ends: 10333 [2020-07-21 12:17:41,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 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 12:17:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10333 states. [2020-07-21 12:17:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10333 to 5236. [2020-07-21 12:17:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2020-07-21 12:17:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8571 transitions. [2020-07-21 12:17:41,412 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8571 transitions. Word has length 467 [2020-07-21 12:17:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:41,412 INFO L479 AbstractCegarLoop]: Abstraction has 5236 states and 8571 transitions. [2020-07-21 12:17:41,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8571 transitions. [2020-07-21 12:17:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 12:17:41,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:41,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:41,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:41,641 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash 536524677, now seen corresponding path program 1 times [2020-07-21 12:17:41,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:41,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321286180] [2020-07-21 12:17:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2958 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:42,471 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 12:17:42,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:42,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321286180] [2020-07-21 12:17:42,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:42,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:42,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769024840] [2020-07-21 12:17:42,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:42,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:42,474 INFO L87 Difference]: Start difference. First operand 5236 states and 8571 transitions. Second operand 3 states. [2020-07-21 12:17:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:42,923 INFO L93 Difference]: Finished difference Result 15048 states and 24542 transitions. [2020-07-21 12:17:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:42,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 468 [2020-07-21 12:17:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:42,972 INFO L225 Difference]: With dead ends: 15048 [2020-07-21 12:17:42,973 INFO L226 Difference]: Without dead ends: 10211 [2020-07-21 12:17:42,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 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 12:17:43,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2020-07-21 12:17:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165. [2020-07-21 12:17:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10165 states. [2020-07-21 12:17:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16557 transitions. [2020-07-21 12:17:43,541 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 16557 transitions. Word has length 468 [2020-07-21 12:17:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:43,541 INFO L479 AbstractCegarLoop]: Abstraction has 10165 states and 16557 transitions. [2020-07-21 12:17:43,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 16557 transitions. [2020-07-21 12:17:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 12:17:43,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:43,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:43,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:43,782 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1157993354, now seen corresponding path program 1 times [2020-07-21 12:17:43,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:43,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204346407] [2020-07-21 12:17:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 2960 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:44,370 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 12:17:44,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:44,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204346407] [2020-07-21 12:17:44,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:44,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:44,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485951454] [2020-07-21 12:17:44,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:44,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:44,373 INFO L87 Difference]: Start difference. First operand 10165 states and 16557 transitions. Second operand 3 states. [2020-07-21 12:17:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:44,875 INFO L93 Difference]: Finished difference Result 30239 states and 49226 transitions. [2020-07-21 12:17:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:44,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 468 [2020-07-21 12:17:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:44,921 INFO L225 Difference]: With dead ends: 30239 [2020-07-21 12:17:44,922 INFO L226 Difference]: Without dead ends: 20218 [2020-07-21 12:17:44,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 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 12:17:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2020-07-21 12:17:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 10263. [2020-07-21 12:17:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10263 states. [2020-07-21 12:17:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 16708 transitions. [2020-07-21 12:17:45,345 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 16708 transitions. Word has length 468 [2020-07-21 12:17:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:45,346 INFO L479 AbstractCegarLoop]: Abstraction has 10263 states and 16708 transitions. [2020-07-21 12:17:45,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 16708 transitions. [2020-07-21 12:17:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 12:17:45,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:45,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:45,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:45,587 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:45,588 INFO L82 PathProgramCache]: Analyzing trace with hash 284183058, now seen corresponding path program 1 times [2020-07-21 12:17:45,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:45,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467601737] [2020-07-21 12:17:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2961 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:46,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:46,761 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 12:17:46,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:46,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467601737] [2020-07-21 12:17:46,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:46,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:46,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046536117] [2020-07-21 12:17:46,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:46,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:46,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:46,776 INFO L87 Difference]: Start difference. First operand 10263 states and 16708 transitions. Second operand 3 states. [2020-07-21 12:17:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:47,512 INFO L93 Difference]: Finished difference Result 30374 states and 49407 transitions. [2020-07-21 12:17:47,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:47,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-21 12:17:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:47,557 INFO L225 Difference]: With dead ends: 30374 [2020-07-21 12:17:47,558 INFO L226 Difference]: Without dead ends: 20335 [2020-07-21 12:17:47,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 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 12:17:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20335 states. [2020-07-21 12:17:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 10380. [2020-07-21 12:17:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10380 states. [2020-07-21 12:17:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16854 transitions. [2020-07-21 12:17:48,084 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 16854 transitions. Word has length 469 [2020-07-21 12:17:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:48,084 INFO L479 AbstractCegarLoop]: Abstraction has 10380 states and 16854 transitions. [2020-07-21 12:17:48,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 16854 transitions. [2020-07-21 12:17:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 12:17:48,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:48,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:48,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:48,320 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:48,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2073063424, now seen corresponding path program 1 times [2020-07-21 12:17:48,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:48,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286452343] [2020-07-21 12:17:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:48,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2961 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:48,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:48,961 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 12:17:48,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:48,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286452343] [2020-07-21 12:17:48,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:48,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:48,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118134577] [2020-07-21 12:17:48,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:48,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:48,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:48,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:48,963 INFO L87 Difference]: Start difference. First operand 10380 states and 16854 transitions. Second operand 3 states. [2020-07-21 12:17:49,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:49,696 INFO L93 Difference]: Finished difference Result 29456 states and 47707 transitions. [2020-07-21 12:17:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:49,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 12:17:49,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:49,741 INFO L225 Difference]: With dead ends: 29456 [2020-07-21 12:17:49,741 INFO L226 Difference]: Without dead ends: 20045 [2020-07-21 12:17:49,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 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 12:17:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2020-07-21 12:17:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001. [2020-07-21 12:17:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-07-21 12:17:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32327 transitions. [2020-07-21 12:17:50,369 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 32327 transitions. Word has length 470 [2020-07-21 12:17:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:50,369 INFO L479 AbstractCegarLoop]: Abstraction has 20001 states and 32327 transitions. [2020-07-21 12:17:50,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 32327 transitions. [2020-07-21 12:17:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 12:17:50,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:50,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:50,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:50,594 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:50,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1777003357, now seen corresponding path program 1 times [2020-07-21 12:17:50,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:50,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794412847] [2020-07-21 12:17:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:17:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:51,269 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 12:17:51,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:51,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794412847] [2020-07-21 12:17:51,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:51,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:17:51,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272039636] [2020-07-21 12:17:51,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:17:51,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:17:51,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:17:51,271 INFO L87 Difference]: Start difference. First operand 20001 states and 32327 transitions. Second operand 4 states. [2020-07-21 12:17:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:52,876 INFO L93 Difference]: Finished difference Result 55373 states and 89008 transitions. [2020-07-21 12:17:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:17:52,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-07-21 12:17:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:52,935 INFO L225 Difference]: With dead ends: 55373 [2020-07-21 12:17:52,935 INFO L226 Difference]: Without dead ends: 37652 [2020-07-21 12:17:52,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 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 12:17:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37652 states. [2020-07-21 12:17:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37652 to 21294. [2020-07-21 12:17:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21294 states. [2020-07-21 12:17:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21294 states to 21294 states and 34606 transitions. [2020-07-21 12:17:54,848 INFO L78 Accepts]: Start accepts. Automaton has 21294 states and 34606 transitions. Word has length 470 [2020-07-21 12:17:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:54,849 INFO L479 AbstractCegarLoop]: Abstraction has 21294 states and 34606 transitions. [2020-07-21 12:17:54,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:17:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 21294 states and 34606 transitions. [2020-07-21 12:17:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 12:17:54,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:54,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:55,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:55,072 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -72931109, now seen corresponding path program 1 times [2020-07-21 12:17:55,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:55,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511277333] [2020-07-21 12:17:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:55,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:55,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:55,649 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 12:17:55,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:55,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511277333] [2020-07-21 12:17:55,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:55,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:55,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643729154] [2020-07-21 12:17:55,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:55,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:55,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:55,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:55,655 INFO L87 Difference]: Start difference. First operand 21294 states and 34606 transitions. Second operand 3 states. [2020-07-21 12:17:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:56,640 INFO L93 Difference]: Finished difference Result 56851 states and 91315 transitions. [2020-07-21 12:17:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:56,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-21 12:17:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:56,696 INFO L225 Difference]: With dead ends: 56851 [2020-07-21 12:17:56,697 INFO L226 Difference]: Without dead ends: 39110 [2020-07-21 12:17:56,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 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 12:17:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39110 states. [2020-07-21 12:17:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39110 to 21741. [2020-07-21 12:17:57,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21741 states. [2020-07-21 12:17:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21741 states to 21741 states and 35281 transitions. [2020-07-21 12:17:57,733 INFO L78 Accepts]: Start accepts. Automaton has 21741 states and 35281 transitions. Word has length 473 [2020-07-21 12:17:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:57,733 INFO L479 AbstractCegarLoop]: Abstraction has 21741 states and 35281 transitions. [2020-07-21 12:17:57,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 21741 states and 35281 transitions. [2020-07-21 12:17:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 12:17:57,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:57,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:17:57,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:57,957 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:57,960 INFO L82 PathProgramCache]: Analyzing trace with hash -234166903, now seen corresponding path program 1 times [2020-07-21 12:17:57,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:57,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901746513] [2020-07-21 12:17:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:17:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:58,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:58,544 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 12:17:58,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:58,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901746513] [2020-07-21 12:17:58,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:58,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:58,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953585462] [2020-07-21 12:17:58,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:58,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:58,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:58,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:58,547 INFO L87 Difference]: Start difference. First operand 21741 states and 35281 transitions. Second operand 3 states. [2020-07-21 12:18:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:00,356 INFO L93 Difference]: Finished difference Result 57580 states and 92364 transitions. [2020-07-21 12:18:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:00,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 12:18:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:00,403 INFO L225 Difference]: With dead ends: 57580 [2020-07-21 12:18:00,404 INFO L226 Difference]: Without dead ends: 39725 [2020-07-21 12:18:00,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 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 12:18:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39725 states. [2020-07-21 12:18:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39725 to 22388. [2020-07-21 12:18:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22388 states. [2020-07-21 12:18:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22388 states to 22388 states and 36221 transitions. [2020-07-21 12:18:01,216 INFO L78 Accepts]: Start accepts. Automaton has 22388 states and 36221 transitions. Word has length 474 [2020-07-21 12:18:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:01,216 INFO L479 AbstractCegarLoop]: Abstraction has 22388 states and 36221 transitions. [2020-07-21 12:18:01,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 22388 states and 36221 transitions. [2020-07-21 12:18:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 12:18:01,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:01,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:01,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:01,448 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1864740007, now seen corresponding path program 1 times [2020-07-21 12:18:01,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:01,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349792889] [2020-07-21 12:18:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:18:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:02,077 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 12:18:02,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:02,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349792889] [2020-07-21 12:18:02,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:02,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:02,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470502508] [2020-07-21 12:18:02,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:02,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:02,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:02,080 INFO L87 Difference]: Start difference. First operand 22388 states and 36221 transitions. Second operand 3 states. [2020-07-21 12:18:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:03,263 INFO L93 Difference]: Finished difference Result 58492 states and 93548 transitions. [2020-07-21 12:18:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:03,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 12:18:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:03,310 INFO L225 Difference]: With dead ends: 58492 [2020-07-21 12:18:03,310 INFO L226 Difference]: Without dead ends: 40579 [2020-07-21 12:18:03,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 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 12:18:03,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40579 states. [2020-07-21 12:18:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40579 to 23242. [2020-07-21 12:18:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23242 states. [2020-07-21 12:18:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23242 states to 23242 states and 37283 transitions. [2020-07-21 12:18:04,413 INFO L78 Accepts]: Start accepts. Automaton has 23242 states and 37283 transitions. Word has length 475 [2020-07-21 12:18:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:04,414 INFO L479 AbstractCegarLoop]: Abstraction has 23242 states and 37283 transitions. [2020-07-21 12:18:04,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 23242 states and 37283 transitions. [2020-07-21 12:18:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 12:18:04,438 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:04,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:04,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:04,653 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2045453381, now seen corresponding path program 1 times [2020-07-21 12:18:04,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:04,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486955284] [2020-07-21 12:18:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:18:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:18:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:05,319 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 12:18:05,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:05,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486955284] [2020-07-21 12:18:05,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:05,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:18:05,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478782372] [2020-07-21 12:18:05,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:18:05,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:18:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:18:05,321 INFO L87 Difference]: Start difference. First operand 23242 states and 37283 transitions. Second operand 5 states. [2020-07-21 12:18:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:07,346 INFO L93 Difference]: Finished difference Result 34875 states and 55256 transitions. [2020-07-21 12:18:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:18:07,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-21 12:18:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:07,366 INFO L225 Difference]: With dead ends: 34875 [2020-07-21 12:18:07,366 INFO L226 Difference]: Without dead ends: 23242 [2020-07-21 12:18:07,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 472 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 12:18:07,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2020-07-21 12:18:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 23242. [2020-07-21 12:18:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23242 states. [2020-07-21 12:18:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23242 states to 23242 states and 37059 transitions. [2020-07-21 12:18:08,184 INFO L78 Accepts]: Start accepts. Automaton has 23242 states and 37059 transitions. Word has length 476 [2020-07-21 12:18:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:08,185 INFO L479 AbstractCegarLoop]: Abstraction has 23242 states and 37059 transitions. [2020-07-21 12:18:08,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:18:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 23242 states and 37059 transitions. [2020-07-21 12:18:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 12:18:08,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:08,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:08,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:08,405 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:08,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1539997558, now seen corresponding path program 1 times [2020-07-21 12:18:08,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:08,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058619145] [2020-07-21 12:18:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:18:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:08,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 12:18:08,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:09,052 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 12:18:09,771 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 12:18:09,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:09,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058619145] [2020-07-21 12:18:09,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:09,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-21 12:18:09,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825435027] [2020-07-21 12:18:09,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 12:18:09,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:09,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 12:18:09,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-07-21 12:18:09,774 INFO L87 Difference]: Start difference. First operand 23242 states and 37059 transitions. Second operand 14 states. [2020-07-21 12:18:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:17,021 INFO L93 Difference]: Finished difference Result 55743 states and 88588 transitions. [2020-07-21 12:18:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 12:18:17,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 476 [2020-07-21 12:18:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:17,069 INFO L225 Difference]: With dead ends: 55743 [2020-07-21 12:18:17,069 INFO L226 Difference]: Without dead ends: 53854 [2020-07-21 12:18:17,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 12:18:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53854 states. [2020-07-21 12:18:18,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53854 to 26798. [2020-07-21 12:18:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26798 states. [2020-07-21 12:18:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26798 states to 26798 states and 42335 transitions. [2020-07-21 12:18:18,469 INFO L78 Accepts]: Start accepts. Automaton has 26798 states and 42335 transitions. Word has length 476 [2020-07-21 12:18:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:18,470 INFO L479 AbstractCegarLoop]: Abstraction has 26798 states and 42335 transitions. [2020-07-21 12:18:18,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 12:18:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 26798 states and 42335 transitions. [2020-07-21 12:18:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 12:18:18,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:18,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:18,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:18,691 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash -450585505, now seen corresponding path program 1 times [2020-07-21 12:18:18,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:18,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656603723] [2020-07-21 12:18:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:18:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 2984 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 12:18:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:19,419 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 12:18:20,088 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 12:18:20,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:20,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656603723] [2020-07-21 12:18:20,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:20,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-21 12:18:20,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126385601] [2020-07-21 12:18:20,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 12:18:20,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 12:18:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:18:20,090 INFO L87 Difference]: Start difference. First operand 26798 states and 42335 transitions. Second operand 16 states. [2020-07-21 12:18:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:29,305 INFO L93 Difference]: Finished difference Result 72061 states and 111928 transitions. [2020-07-21 12:18:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 12:18:29,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 476 [2020-07-21 12:18:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:29,359 INFO L225 Difference]: With dead ends: 72061 [2020-07-21 12:18:29,359 INFO L226 Difference]: Without dead ends: 67148 [2020-07-21 12:18:29,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 12:18:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67148 states. [2020-07-21 12:18:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67148 to 29394. [2020-07-21 12:18:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29394 states. [2020-07-21 12:18:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29394 states to 29394 states and 46131 transitions. [2020-07-21 12:18:31,097 INFO L78 Accepts]: Start accepts. Automaton has 29394 states and 46131 transitions. Word has length 476 [2020-07-21 12:18:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:31,098 INFO L479 AbstractCegarLoop]: Abstraction has 29394 states and 46131 transitions. [2020-07-21 12:18:31,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 12:18:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 29394 states and 46131 transitions. [2020-07-21 12:18:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 12:18:31,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:31,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:31,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:31,323 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2013494006, now seen corresponding path program 1 times [2020-07-21 12:18:31,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:31,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948600719] [2020-07-21 12:18:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:18:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:31,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 2982 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:18:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:32,262 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 12:18:32,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:32,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948600719] [2020-07-21 12:18:32,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:32,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:18:32,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494413056] [2020-07-21 12:18:32,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:18:32,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:18:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:18:32,265 INFO L87 Difference]: Start difference. First operand 29394 states and 46131 transitions. Second operand 4 states. [2020-07-21 12:18:36,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:36,453 INFO L93 Difference]: Finished difference Result 86092 states and 134954 transitions. [2020-07-21 12:18:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:18:36,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 12:18:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:36,506 INFO L225 Difference]: With dead ends: 86092 [2020-07-21 12:18:36,507 INFO L226 Difference]: Without dead ends: 57523 [2020-07-21 12:18:36,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 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 12:18:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57523 states. [2020-07-21 12:18:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57523 to 57499. [2020-07-21 12:18:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57499 states. [2020-07-21 12:18:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57499 states to 57499 states and 89656 transitions. [2020-07-21 12:18:39,751 INFO L78 Accepts]: Start accepts. Automaton has 57499 states and 89656 transitions. Word has length 476 [2020-07-21 12:18:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:39,752 INFO L479 AbstractCegarLoop]: Abstraction has 57499 states and 89656 transitions. [2020-07-21 12:18:39,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:18:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 57499 states and 89656 transitions. [2020-07-21 12:18:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 12:18:39,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:39,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:39,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:39,997 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash -258853766, now seen corresponding path program 1 times [2020-07-21 12:18:39,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:39,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038408706] [2020-07-21 12:18:40,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:18:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:40,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:40,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:40,597 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 12:18:40,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:40,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038408706] [2020-07-21 12:18:40,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:40,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:40,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083754227] [2020-07-21 12:18:40,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:40,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:40,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:40,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:40,599 INFO L87 Difference]: Start difference. First operand 57499 states and 89656 transitions. Second operand 3 states. [2020-07-21 12:18:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:48,766 INFO L93 Difference]: Finished difference Result 168669 states and 262770 transitions. [2020-07-21 12:18:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:48,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 12:18:48,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:48,904 INFO L225 Difference]: With dead ends: 168669 [2020-07-21 12:18:48,904 INFO L226 Difference]: Without dead ends: 112895 [2020-07-21 12:18:48,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 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 12:18:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112895 states. [2020-07-21 12:18:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112895 to 112860. [2020-07-21 12:18:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112860 states. [2020-07-21 12:18:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112860 states to 112860 states and 175370 transitions. [2020-07-21 12:18:55,457 INFO L78 Accepts]: Start accepts. Automaton has 112860 states and 175370 transitions. Word has length 478 [2020-07-21 12:18:55,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:55,458 INFO L479 AbstractCegarLoop]: Abstraction has 112860 states and 175370 transitions. [2020-07-21 12:18:55,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 112860 states and 175370 transitions. [2020-07-21 12:18:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 12:18:55,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:55,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:18:55,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:55,750 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:55,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash -749123343, now seen corresponding path program 1 times [2020-07-21 12:18:55,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:55,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289163211] [2020-07-21 12:18:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:18:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:56,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:56,611 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 12:18:56,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:56,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289163211] [2020-07-21 12:18:56,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:56,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:56,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179148622] [2020-07-21 12:18:56,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:56,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:56,613 INFO L87 Difference]: Start difference. First operand 112860 states and 175370 transitions. Second operand 3 states. [2020-07-21 12:19:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:11,212 INFO L93 Difference]: Finished difference Result 323142 states and 498401 transitions. [2020-07-21 12:19:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:19:11,212 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 12:19:11,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:11,419 INFO L225 Difference]: With dead ends: 323142 [2020-07-21 12:19:11,419 INFO L226 Difference]: Without dead ends: 217909 [2020-07-21 12:19:11,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 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 12:19:11,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217909 states. [2020-07-21 12:19:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217909 to 114136. [2020-07-21 12:19:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114136 states. [2020-07-21 12:19:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114136 states to 114136 states and 177256 transitions. [2020-07-21 12:19:22,819 INFO L78 Accepts]: Start accepts. Automaton has 114136 states and 177256 transitions. Word has length 479 [2020-07-21 12:19:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:22,819 INFO L479 AbstractCegarLoop]: Abstraction has 114136 states and 177256 transitions. [2020-07-21 12:19:22,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:19:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 114136 states and 177256 transitions. [2020-07-21 12:19:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 12:19:22,906 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:22,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:23,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:23,107 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash -782169030, now seen corresponding path program 1 times [2020-07-21 12:19:23,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:23,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364147630] [2020-07-21 12:19:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:19:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:19:23,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:23,653 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 12:19:23,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:19:23,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364147630] [2020-07-21 12:19:23,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:19:23,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:19:23,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396274800] [2020-07-21 12:19:23,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:19:23,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:19:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:23,656 INFO L87 Difference]: Start difference. First operand 114136 states and 177256 transitions. Second operand 3 states. [2020-07-21 12:19:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:37,735 INFO L93 Difference]: Finished difference Result 326422 states and 503430 transitions. [2020-07-21 12:19:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:19:37,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 12:19:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:37,939 INFO L225 Difference]: With dead ends: 326422 [2020-07-21 12:19:37,940 INFO L226 Difference]: Without dead ends: 220029 [2020-07-21 12:19:38,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 12:19:38,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220029 states. [2020-07-21 12:19:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220029 to 116225. [2020-07-21 12:19:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116225 states. [2020-07-21 12:19:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116225 states to 116225 states and 180436 transitions. [2020-07-21 12:19:49,900 INFO L78 Accepts]: Start accepts. Automaton has 116225 states and 180436 transitions. Word has length 480 [2020-07-21 12:19:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:49,901 INFO L479 AbstractCegarLoop]: Abstraction has 116225 states and 180436 transitions. [2020-07-21 12:19:49,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:19:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 116225 states and 180436 transitions. [2020-07-21 12:19:49,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 12:19:49,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:49,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:19:50,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:50,197 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:50,198 INFO L82 PathProgramCache]: Analyzing trace with hash -802049035, now seen corresponding path program 1 times [2020-07-21 12:19:50,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:50,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757717767] [2020-07-21 12:19:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:19:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:50,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:19:50,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:50,860 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 12:19:50,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:19:50,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757717767] [2020-07-21 12:19:50,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:19:50,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:19:50,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072660650] [2020-07-21 12:19:50,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:19:50,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:19:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:50,863 INFO L87 Difference]: Start difference. First operand 116225 states and 180436 transitions. Second operand 3 states. [2020-07-21 12:20:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:07,079 INFO L93 Difference]: Finished difference Result 335108 states and 518834 transitions. [2020-07-21 12:20:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:07,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 12:20:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:10,428 INFO L225 Difference]: With dead ends: 335108 [2020-07-21 12:20:10,428 INFO L226 Difference]: Without dead ends: 228707 [2020-07-21 12:20:10,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 12:20:10,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228707 states. [2020-07-21 12:20:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228707 to 228676. [2020-07-21 12:20:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228676 states. [2020-07-21 12:20:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228676 states to 228676 states and 353230 transitions. [2020-07-21 12:20:27,142 INFO L78 Accepts]: Start accepts. Automaton has 228676 states and 353230 transitions. Word has length 480 [2020-07-21 12:20:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:27,142 INFO L479 AbstractCegarLoop]: Abstraction has 228676 states and 353230 transitions. [2020-07-21 12:20:27,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 228676 states and 353230 transitions. [2020-07-21 12:20:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 12:20:27,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:27,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:20:27,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:27,597 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:27,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:27,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1410786531, now seen corresponding path program 1 times [2020-07-21 12:20:27,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:27,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542414681] [2020-07-21 12:20:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:20:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:28,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:20:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:28,146 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 12:20:28,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:28,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542414681] [2020-07-21 12:20:28,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:28,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:28,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495282536] [2020-07-21 12:20:28,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:28,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:28,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:28,148 INFO L87 Difference]: Start difference. First operand 228676 states and 353230 transitions. Second operand 3 states. [2020-07-21 12:21:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:02,143 INFO L93 Difference]: Finished difference Result 650408 states and 997528 transitions. [2020-07-21 12:21:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:21:02,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 12:21:02,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:02,589 INFO L225 Difference]: With dead ends: 650408 [2020-07-21 12:21:02,589 INFO L226 Difference]: Without dead ends: 439249 [2020-07-21 12:21:02,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 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 12:21:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439249 states. [2020-07-21 12:21:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439249 to 233226. [2020-07-21 12:21:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233226 states. [2020-07-21 12:21:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233226 states to 233226 states and 359480 transitions. [2020-07-21 12:21:27,006 INFO L78 Accepts]: Start accepts. Automaton has 233226 states and 359480 transitions. Word has length 481 [2020-07-21 12:21:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:27,006 INFO L479 AbstractCegarLoop]: Abstraction has 233226 states and 359480 transitions. [2020-07-21 12:21:27,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 233226 states and 359480 transitions. [2020-07-21 12:21:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 12:21:27,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:27,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:21:27,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:27,485 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash -868525168, now seen corresponding path program 1 times [2020-07-21 12:21:27,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:27,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54080058] [2020-07-21 12:21:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:21:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:27,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 2991 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:21:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:28,282 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 12:21:28,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:28,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54080058] [2020-07-21 12:21:28,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:28,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:21:28,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368051122] [2020-07-21 12:21:28,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:21:28,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:28,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:21:28,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:21:28,287 INFO L87 Difference]: Start difference. First operand 233226 states and 359480 transitions. Second operand 3 states. [2020-07-21 12:22:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:05,965 INFO L93 Difference]: Finished difference Result 680593 states and 1047568 transitions. [2020-07-21 12:22:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:05,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 12:22:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:06,464 INFO L225 Difference]: With dead ends: 680593 [2020-07-21 12:22:06,465 INFO L226 Difference]: Without dead ends: 458474 [2020-07-21 12:22:06,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 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 12:22:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458474 states. [2020-07-21 12:22:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458474 to 458447. [2020-07-21 12:22:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458447 states. [2020-07-21 12:22:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458447 states to 458447 states and 703312 transitions. [2020-07-21 12:22:48,234 INFO L78 Accepts]: Start accepts. Automaton has 458447 states and 703312 transitions. Word has length 482 [2020-07-21 12:22:48,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:48,235 INFO L479 AbstractCegarLoop]: Abstraction has 458447 states and 703312 transitions. [2020-07-21 12:22:48,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 458447 states and 703312 transitions. [2020-07-21 12:22:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 12:22:48,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:48,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:48,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:48,980 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash -889794259, now seen corresponding path program 1 times [2020-07-21 12:22:48,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:48,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274934616] [2020-07-21 12:22:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:22:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:22:50,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:50,295 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 12:22:50,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:50,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274934616] [2020-07-21 12:22:50,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:50,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:22:50,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512781758] [2020-07-21 12:22:50,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:22:50,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:50,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:22:50,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:22:50,297 INFO L87 Difference]: Start difference. First operand 458447 states and 703312 transitions. Second operand 4 states. [2020-07-21 12:24:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:08,361 INFO L93 Difference]: Finished difference Result 1150779 states and 1750856 transitions. [2020-07-21 12:24:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:24:08,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-21 12:24:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:09,237 INFO L225 Difference]: With dead ends: 1150779 [2020-07-21 12:24:09,237 INFO L226 Difference]: Without dead ends: 817126 [2020-07-21 12:24:09,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 479 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 12:24:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817126 states. [2020-07-21 12:25:08,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817126 to 507923. [2020-07-21 12:25:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507923 states. [2020-07-21 12:25:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507923 states to 507923 states and 784551 transitions. [2020-07-21 12:25:09,391 INFO L78 Accepts]: Start accepts. Automaton has 507923 states and 784551 transitions. Word has length 482 [2020-07-21 12:25:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:25:09,392 INFO L479 AbstractCegarLoop]: Abstraction has 507923 states and 784551 transitions. [2020-07-21 12:25:09,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:25:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 507923 states and 784551 transitions. [2020-07-21 12:25:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 12:25:10,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:25:10,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:25:10,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:10,917 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:25:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:25:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2076563602, now seen corresponding path program 1 times [2020-07-21 12:25:10,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:25:10,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37641328] [2020-07-21 12:25:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:25:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:25:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 2999 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:25:11,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:25:11,493 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 12:25:11,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:25:11,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37641328] [2020-07-21 12:25:11,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:25:11,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:25:11,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067205820] [2020-07-21 12:25:11,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:25:11,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:25:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:25:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:25:11,495 INFO L87 Difference]: Start difference. First operand 507923 states and 784551 transitions. Second operand 3 states. [2020-07-21 12:26:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:31,897 INFO L93 Difference]: Finished difference Result 1177725 states and 1791361 transitions. [2020-07-21 12:26:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:31,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 12:26:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:32,944 INFO L225 Difference]: With dead ends: 1177725 [2020-07-21 12:26:32,945 INFO L226 Difference]: Without dead ends: 842504 [2020-07-21 12:26:33,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 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 12:26:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842504 states. [2020-07-21 12:27:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842504 to 514739. [2020-07-21 12:27:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514739 states. [2020-07-21 12:27:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514739 states to 514739 states and 794623 transitions. [2020-07-21 12:27:32,306 INFO L78 Accepts]: Start accepts. Automaton has 514739 states and 794623 transitions. Word has length 485 [2020-07-21 12:27:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:32,306 INFO L479 AbstractCegarLoop]: Abstraction has 514739 states and 794623 transitions. [2020-07-21 12:27:32,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 514739 states and 794623 transitions. [2020-07-21 12:27:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 12:27:32,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:32,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:27:33,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:33,021 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash -633911535, now seen corresponding path program 1 times [2020-07-21 12:27:33,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:33,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085225206] [2020-07-21 12:27:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:27:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 3000 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:27:33,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:33,571 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 12:27:33,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:33,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085225206] [2020-07-21 12:27:33,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:33,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:27:33,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615531342] [2020-07-21 12:27:33,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:27:33,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:27:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:33,573 INFO L87 Difference]: Start difference. First operand 514739 states and 794623 transitions. Second operand 3 states. [2020-07-21 12:28:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:28:56,319 INFO L93 Difference]: Finished difference Result 1195453 states and 1818177 transitions. [2020-07-21 12:28:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:28:56,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 12:28:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:28:57,423 INFO L225 Difference]: With dead ends: 1195453 [2020-07-21 12:28:57,423 INFO L226 Difference]: Without dead ends: 853912 [2020-07-21 12:28:57,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 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 12:28:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853912 states.