/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:05:30,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:05:30,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:05:30,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:05:30,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:05:30,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:05:30,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:05:30,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:05:30,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:05:30,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:05:30,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:05:30,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:05:30,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:05:30,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:05:30,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:05:30,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:05:30,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:05:30,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:05:30,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:05:30,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:05:30,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:05:30,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:05:30,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:05:30,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:05:30,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 21:05:30,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:05:30,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:05:30,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:05:30,186 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 21:05:30,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:05:30,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:05:30,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:05:30,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:05:30,208 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:05:30,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:05:30,208 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:05:30,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:05:30,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:05:30,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:05:30,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:05:30,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:05:30,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:05:30,211 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:05:30,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:05:30,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:05:30,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:05:30,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:05:30,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:05:30,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:05:30,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:05:30,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:05:30,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:05:30,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:05:30,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:05:30,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:05:30,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:30,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:05:30,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:05:30,214 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 21:05:30,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:05:30,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:05:30,559 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:05:30,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:05:30,562 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:05:30,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 21:05:30,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c031fc8/ffbffc9a736447efad6b03290ebc6997/FLAGee41d0e48 [2020-07-21 21:05:31,275 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:05:31,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 21:05:31,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c031fc8/ffbffc9a736447efad6b03290ebc6997/FLAGee41d0e48 [2020-07-21 21:05:31,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83c031fc8/ffbffc9a736447efad6b03290ebc6997 [2020-07-21 21:05:31,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:05:31,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:05:31,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:31,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:05:31,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:05:31,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:31" (1/1) ... [2020-07-21 21:05:31,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfe3aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:31, skipping insertion in model container [2020-07-21 21:05:31,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:31" (1/1) ... [2020-07-21 21:05:31,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:05:31,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:05:32,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:32,674 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:05:33,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:33,141 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:05:33,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33 WrapperNode [2020-07-21 21:05:33,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:33,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:05:33,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:05:33,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:05:33,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (1/1) ... [2020-07-21 21:05:33,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (1/1) ... [2020-07-21 21:05:33,221 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (1/1) ... [2020-07-21 21:05:33,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (1/1) ... [2020-07-21 21:05:33,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (1/1) ... [2020-07-21 21:05:33,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (1/1) ... [2020-07-21 21:05:33,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (1/1) ... [2020-07-21 21:05:33,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:05:33,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:05:33,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:05:33,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:05:33,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (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 21:05:33,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:05:33,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:05:33,476 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:05:33,476 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:05:33,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:05:33,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:05:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:05:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:05:33,478 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:05:33,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:05:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:05:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:05:33,480 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:05:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:05:33,481 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:05:33,482 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:05:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:05:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:05:33,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:05:33,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:05:33,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:05:36,161 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:05:36,161 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:05:36,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:36 BoogieIcfgContainer [2020-07-21 21:05:36,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:05:36,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:05:36,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:05:36,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:05:36,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:05:31" (1/3) ... [2020-07-21 21:05:36,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3cb6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:36, skipping insertion in model container [2020-07-21 21:05:36,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:33" (2/3) ... [2020-07-21 21:05:36,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3cb6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:36, skipping insertion in model container [2020-07-21 21:05:36,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:36" (3/3) ... [2020-07-21 21:05:36,180 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 21:05:36,190 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:05:36,198 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 21:05:36,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 21:05:36,239 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:05:36,239 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:05:36,239 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:05:36,239 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:05:36,240 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:05:36,240 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:05:36,240 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:05:36,240 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:05:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 21:05:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 21:05:36,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:36,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:36,310 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:36,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 21:05:36,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:36,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318485371] [2020-07-21 21:05:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:36,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:36,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:36,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:05:37,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:37,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318485371] [2020-07-21 21:05:37,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:37,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:37,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885856667] [2020-07-21 21:05:37,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:37,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:37,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:37,135 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 21:05:37,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:37,554 INFO L93 Difference]: Finished difference Result 2328 states and 4137 transitions. [2020-07-21 21:05:37,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:05:37,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 21:05:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:37,582 INFO L225 Difference]: With dead ends: 2328 [2020-07-21 21:05:37,582 INFO L226 Difference]: Without dead ends: 1542 [2020-07-21 21:05:37,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 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 21:05:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-07-21 21:05:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1540. [2020-07-21 21:05:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1540 states. [2020-07-21 21:05:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2395 transitions. [2020-07-21 21:05:37,738 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2395 transitions. Word has length 324 [2020-07-21 21:05:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:37,741 INFO L479 AbstractCegarLoop]: Abstraction has 1540 states and 2395 transitions. [2020-07-21 21:05:37,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2395 transitions. [2020-07-21 21:05:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:37,754 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:37,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:37,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:37,968 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash 559759921, now seen corresponding path program 1 times [2020-07-21 21:05:37,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:37,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436800373] [2020-07-21 21:05:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:38,287 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:38,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:38,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:38,505 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 21:05:38,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:38,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436800373] [2020-07-21 21:05:38,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:38,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:38,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632733010] [2020-07-21 21:05:38,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:38,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:38,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:38,514 INFO L87 Difference]: Start difference. First operand 1540 states and 2395 transitions. Second operand 3 states. [2020-07-21 21:05:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:38,697 INFO L93 Difference]: Finished difference Result 4422 states and 6847 transitions. [2020-07-21 21:05:38,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:38,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:38,715 INFO L225 Difference]: With dead ends: 4422 [2020-07-21 21:05:38,715 INFO L226 Difference]: Without dead ends: 2984 [2020-07-21 21:05:38,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2984 states. [2020-07-21 21:05:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2984 to 2982. [2020-07-21 21:05:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2982 states. [2020-07-21 21:05:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 4607 transitions. [2020-07-21 21:05:38,853 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 4607 transitions. Word has length 326 [2020-07-21 21:05:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:38,858 INFO L479 AbstractCegarLoop]: Abstraction has 2982 states and 4607 transitions. [2020-07-21 21:05:38,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:38,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 4607 transitions. [2020-07-21 21:05:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 21:05:38,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:38,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:39,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:39,091 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash 59250742, now seen corresponding path program 1 times [2020-07-21 21:05:39,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:39,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038958474] [2020-07-21 21:05:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:39,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:39,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:39,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:05:39,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:39,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038958474] [2020-07-21 21:05:39,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:39,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:39,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74220981] [2020-07-21 21:05:39,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:39,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:39,488 INFO L87 Difference]: Start difference. First operand 2982 states and 4607 transitions. Second operand 3 states. [2020-07-21 21:05:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:39,731 INFO L93 Difference]: Finished difference Result 8914 states and 13772 transitions. [2020-07-21 21:05:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:39,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 21:05:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:39,758 INFO L225 Difference]: With dead ends: 8914 [2020-07-21 21:05:39,759 INFO L226 Difference]: Without dead ends: 5947 [2020-07-21 21:05:39,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5947 states. [2020-07-21 21:05:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5947 to 2993. [2020-07-21 21:05:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2020-07-21 21:05:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 4623 transitions. [2020-07-21 21:05:39,938 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 4623 transitions. Word has length 326 [2020-07-21 21:05:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:39,938 INFO L479 AbstractCegarLoop]: Abstraction has 2993 states and 4623 transitions. [2020-07-21 21:05:39,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 4623 transitions. [2020-07-21 21:05:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 21:05:39,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:39,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:40,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:40,160 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:40,161 INFO L82 PathProgramCache]: Analyzing trace with hash -882201744, now seen corresponding path program 1 times [2020-07-21 21:05:40,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:40,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676501868] [2020-07-21 21:05:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:40,406 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:40,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:40,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:40,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:40,498 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 21:05:40,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:40,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676501868] [2020-07-21 21:05:40,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:40,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:40,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417873855] [2020-07-21 21:05:40,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:40,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:40,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:40,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:40,501 INFO L87 Difference]: Start difference. First operand 2993 states and 4623 transitions. Second operand 3 states. [2020-07-21 21:05:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:40,767 INFO L93 Difference]: Finished difference Result 8871 states and 13690 transitions. [2020-07-21 21:05:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:40,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 21:05:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:40,794 INFO L225 Difference]: With dead ends: 8871 [2020-07-21 21:05:40,795 INFO L226 Difference]: Without dead ends: 5908 [2020-07-21 21:05:40,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5908 states. [2020-07-21 21:05:40,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5908 to 3003. [2020-07-21 21:05:40,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3003 states. [2020-07-21 21:05:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 4637 transitions. [2020-07-21 21:05:40,966 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 4637 transitions. Word has length 327 [2020-07-21 21:05:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:40,966 INFO L479 AbstractCegarLoop]: Abstraction has 3003 states and 4637 transitions. [2020-07-21 21:05:40,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 4637 transitions. [2020-07-21 21:05:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 21:05:40,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:40,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:41,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:41,187 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:41,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2128959444, now seen corresponding path program 1 times [2020-07-21 21:05:41,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:41,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884035498] [2020-07-21 21:05:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:41,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:41,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:41,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:41,620 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 21:05:41,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:41,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884035498] [2020-07-21 21:05:41,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:41,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:41,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842611657] [2020-07-21 21:05:41,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:41,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:41,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:41,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:41,623 INFO L87 Difference]: Start difference. First operand 3003 states and 4637 transitions. Second operand 3 states. [2020-07-21 21:05:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:41,894 INFO L93 Difference]: Finished difference Result 8613 states and 13241 transitions. [2020-07-21 21:05:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:41,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 21:05:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:41,922 INFO L225 Difference]: With dead ends: 8613 [2020-07-21 21:05:41,923 INFO L226 Difference]: Without dead ends: 5805 [2020-07-21 21:05:41,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 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 21:05:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2020-07-21 21:05:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 5803. [2020-07-21 21:05:42,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5803 states. [2020-07-21 21:05:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 8898 transitions. [2020-07-21 21:05:42,193 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 8898 transitions. Word has length 328 [2020-07-21 21:05:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:42,194 INFO L479 AbstractCegarLoop]: Abstraction has 5803 states and 8898 transitions. [2020-07-21 21:05:42,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 8898 transitions. [2020-07-21 21:05:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 21:05:42,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:42,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:05:42,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:42,423 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1426305655, now seen corresponding path program 1 times [2020-07-21 21:05:42,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:42,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194310054] [2020-07-21 21:05:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:42,662 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:05:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:05:42,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:42,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194310054] [2020-07-21 21:05:42,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:42,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:42,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547610084] [2020-07-21 21:05:42,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:42,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:42,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:42,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:42,821 INFO L87 Difference]: Start difference. First operand 5803 states and 8898 transitions. Second operand 4 states. [2020-07-21 21:05:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:43,211 INFO L93 Difference]: Finished difference Result 16042 states and 24430 transitions. [2020-07-21 21:05:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:43,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 21:05:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:43,251 INFO L225 Difference]: With dead ends: 16042 [2020-07-21 21:05:43,251 INFO L226 Difference]: Without dead ends: 10685 [2020-07-21 21:05:43,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:05:43,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10685 states. [2020-07-21 21:05:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10685 to 6017. [2020-07-21 21:05:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6017 states. [2020-07-21 21:05:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 9262 transitions. [2020-07-21 21:05:43,573 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 9262 transitions. Word has length 328 [2020-07-21 21:05:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:43,574 INFO L479 AbstractCegarLoop]: Abstraction has 6017 states and 9262 transitions. [2020-07-21 21:05:43,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 9262 transitions. [2020-07-21 21:05:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:43,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:43,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:43,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:43,804 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash 730242313, now seen corresponding path program 1 times [2020-07-21 21:05:43,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:43,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147388020] [2020-07-21 21:05:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:44,105 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:44,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:44,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:44,195 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 21:05:44,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:44,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147388020] [2020-07-21 21:05:44,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:44,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:44,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975905853] [2020-07-21 21:05:44,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:44,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:44,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:44,198 INFO L87 Difference]: Start difference. First operand 6017 states and 9262 transitions. Second operand 3 states. [2020-07-21 21:05:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:44,531 INFO L93 Difference]: Finished difference Result 12717 states and 19608 transitions. [2020-07-21 21:05:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:44,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:05:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:44,556 INFO L225 Difference]: With dead ends: 12717 [2020-07-21 21:05:44,557 INFO L226 Difference]: Without dead ends: 8339 [2020-07-21 21:05:44,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:44,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2020-07-21 21:05:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 7001. [2020-07-21 21:05:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7001 states. [2020-07-21 21:05:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 10870 transitions. [2020-07-21 21:05:44,914 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 10870 transitions. Word has length 330 [2020-07-21 21:05:44,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:44,915 INFO L479 AbstractCegarLoop]: Abstraction has 7001 states and 10870 transitions. [2020-07-21 21:05:44,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:44,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 10870 transitions. [2020-07-21 21:05:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:44,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:44,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:45,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:45,191 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:45,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:45,191 INFO L82 PathProgramCache]: Analyzing trace with hash 858352887, now seen corresponding path program 1 times [2020-07-21 21:05:45,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:45,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110253042] [2020-07-21 21:05:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:45,441 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:45,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:45,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:45,532 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 21:05:45,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:45,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110253042] [2020-07-21 21:05:45,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:45,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:45,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247422729] [2020-07-21 21:05:45,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:45,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:45,535 INFO L87 Difference]: Start difference. First operand 7001 states and 10870 transitions. Second operand 3 states. [2020-07-21 21:05:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:45,945 INFO L93 Difference]: Finished difference Result 19711 states and 30314 transitions. [2020-07-21 21:05:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:45,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:05:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:45,974 INFO L225 Difference]: With dead ends: 19711 [2020-07-21 21:05:45,974 INFO L226 Difference]: Without dead ends: 13352 [2020-07-21 21:05:45,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13352 states. [2020-07-21 21:05:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13352 to 7098. [2020-07-21 21:05:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7098 states. [2020-07-21 21:05:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 11000 transitions. [2020-07-21 21:05:46,366 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 11000 transitions. Word has length 330 [2020-07-21 21:05:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:46,367 INFO L479 AbstractCegarLoop]: Abstraction has 7098 states and 11000 transitions. [2020-07-21 21:05:46,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 11000 transitions. [2020-07-21 21:05:46,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 21:05:46,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:46,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:46,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:46,593 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash 903222164, now seen corresponding path program 1 times [2020-07-21 21:05:46,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:46,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545916445] [2020-07-21 21:05:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:46,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:46,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:46,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:46,914 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 21:05:46,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:46,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545916445] [2020-07-21 21:05:46,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:46,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:46,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004840677] [2020-07-21 21:05:46,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:46,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:46,918 INFO L87 Difference]: Start difference. First operand 7098 states and 11000 transitions. Second operand 3 states. [2020-07-21 21:05:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:47,393 INFO L93 Difference]: Finished difference Result 19834 states and 30465 transitions. [2020-07-21 21:05:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:47,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 21:05:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:47,419 INFO L225 Difference]: With dead ends: 19834 [2020-07-21 21:05:47,419 INFO L226 Difference]: Without dead ends: 13495 [2020-07-21 21:05:47,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13495 states. [2020-07-21 21:05:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13495 to 7215. [2020-07-21 21:05:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7215 states. [2020-07-21 21:05:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 11155 transitions. [2020-07-21 21:05:47,816 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 11155 transitions. Word has length 331 [2020-07-21 21:05:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:47,816 INFO L479 AbstractCegarLoop]: Abstraction has 7215 states and 11155 transitions. [2020-07-21 21:05:47,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 11155 transitions. [2020-07-21 21:05:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:05:47,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:47,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:48,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:48,041 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash 960357788, now seen corresponding path program 1 times [2020-07-21 21:05:48,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:48,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182972405] [2020-07-21 21:05:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:48,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:48,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:05:48,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:48,455 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 21:05:48,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:48,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182972405] [2020-07-21 21:05:48,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:48,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:05:48,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740863344] [2020-07-21 21:05:48,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:05:48,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:48,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:05:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:05:48,458 INFO L87 Difference]: Start difference. First operand 7215 states and 11155 transitions. Second operand 9 states. [2020-07-21 21:05:54,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:54,556 INFO L93 Difference]: Finished difference Result 47594 states and 75108 transitions. [2020-07-21 21:05:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:05:54,557 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 332 [2020-07-21 21:05:54,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:54,646 INFO L225 Difference]: With dead ends: 47594 [2020-07-21 21:05:54,647 INFO L226 Difference]: Without dead ends: 45888 [2020-07-21 21:05:54,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 21:05:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45888 states. [2020-07-21 21:05:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45888 to 17943. [2020-07-21 21:05:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17943 states. [2020-07-21 21:05:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17943 states to 17943 states and 28113 transitions. [2020-07-21 21:05:56,555 INFO L78 Accepts]: Start accepts. Automaton has 17943 states and 28113 transitions. Word has length 332 [2020-07-21 21:05:56,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:56,555 INFO L479 AbstractCegarLoop]: Abstraction has 17943 states and 28113 transitions. [2020-07-21 21:05:56,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:05:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand 17943 states and 28113 transitions. [2020-07-21 21:05:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:05:56,568 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:56,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:56,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:56,770 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1837398990, now seen corresponding path program 1 times [2020-07-21 21:05:56,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:56,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729576118] [2020-07-21 21:05:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:57,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:57,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:57,100 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 21:05:57,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:57,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729576118] [2020-07-21 21:05:57,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:57,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:57,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016446710] [2020-07-21 21:05:57,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:57,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:57,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:57,105 INFO L87 Difference]: Start difference. First operand 17943 states and 28113 transitions. Second operand 3 states. [2020-07-21 21:05:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:58,226 INFO L93 Difference]: Finished difference Result 41459 states and 65529 transitions. [2020-07-21 21:05:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:58,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:05:58,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:58,276 INFO L225 Difference]: With dead ends: 41459 [2020-07-21 21:05:58,277 INFO L226 Difference]: Without dead ends: 25517 [2020-07-21 21:05:58,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25517 states. [2020-07-21 21:05:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25517 to 23197. [2020-07-21 21:05:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23197 states. [2020-07-21 21:05:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23197 states to 23197 states and 36735 transitions. [2020-07-21 21:05:59,546 INFO L78 Accepts]: Start accepts. Automaton has 23197 states and 36735 transitions. Word has length 332 [2020-07-21 21:05:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:59,547 INFO L479 AbstractCegarLoop]: Abstraction has 23197 states and 36735 transitions. [2020-07-21 21:05:59,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23197 states and 36735 transitions. [2020-07-21 21:05:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:05:59,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:59,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:59,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:59,761 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 757713930, now seen corresponding path program 1 times [2020-07-21 21:05:59,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:59,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355643167] [2020-07-21 21:05:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:59,999 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:00,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:06:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:00,088 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 21:06:00,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:00,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355643167] [2020-07-21 21:06:00,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:00,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:06:00,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954970085] [2020-07-21 21:06:00,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:06:00,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:06:00,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:06:00,091 INFO L87 Difference]: Start difference. First operand 23197 states and 36735 transitions. Second operand 4 states. [2020-07-21 21:06:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:01,987 INFO L93 Difference]: Finished difference Result 43182 states and 68276 transitions. [2020-07-21 21:06:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:06:01,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 21:06:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:02,008 INFO L225 Difference]: With dead ends: 43182 [2020-07-21 21:06:02,008 INFO L226 Difference]: Without dead ends: 20950 [2020-07-21 21:06:02,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:06:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20950 states. [2020-07-21 21:06:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20950 to 20876. [2020-07-21 21:06:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20876 states. [2020-07-21 21:06:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20876 states to 20876 states and 33035 transitions. [2020-07-21 21:06:02,904 INFO L78 Accepts]: Start accepts. Automaton has 20876 states and 33035 transitions. Word has length 332 [2020-07-21 21:06:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:02,904 INFO L479 AbstractCegarLoop]: Abstraction has 20876 states and 33035 transitions. [2020-07-21 21:06:02,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:06:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 20876 states and 33035 transitions. [2020-07-21 21:06:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 21:06:02,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:02,918 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] [2020-07-21 21:06:03,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:03,119 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:03,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1945945451, now seen corresponding path program 1 times [2020-07-21 21:06:03,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:03,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605364967] [2020-07-21 21:06:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:03,371 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:03,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:06:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:03,493 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 21:06:03,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:03,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605364967] [2020-07-21 21:06:03,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:03,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:06:03,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053498957] [2020-07-21 21:06:03,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:06:03,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:06:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:06:03,496 INFO L87 Difference]: Start difference. First operand 20876 states and 33035 transitions. Second operand 4 states. [2020-07-21 21:06:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:05,470 INFO L93 Difference]: Finished difference Result 61639 states and 97473 transitions. [2020-07-21 21:06:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:06:05,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 21:06:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:05,519 INFO L225 Difference]: With dead ends: 61639 [2020-07-21 21:06:05,520 INFO L226 Difference]: Without dead ends: 40976 [2020-07-21 21:06:05,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 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 21:06:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40976 states. [2020-07-21 21:06:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40976 to 40974. [2020-07-21 21:06:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40974 states. [2020-07-21 21:06:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40974 states to 40974 states and 64533 transitions. [2020-07-21 21:06:07,639 INFO L78 Accepts]: Start accepts. Automaton has 40974 states and 64533 transitions. Word has length 333 [2020-07-21 21:06:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:07,639 INFO L479 AbstractCegarLoop]: Abstraction has 40974 states and 64533 transitions. [2020-07-21 21:06:07,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:06:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 40974 states and 64533 transitions. [2020-07-21 21:06:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 21:06:07,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:07,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:07,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:07,856 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:07,856 INFO L82 PathProgramCache]: Analyzing trace with hash 254132386, now seen corresponding path program 1 times [2020-07-21 21:06:07,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:07,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722877719] [2020-07-21 21:06:07,857 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:08,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:08,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:08,204 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 21:06:08,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:08,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722877719] [2020-07-21 21:06:08,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:08,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:08,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397848079] [2020-07-21 21:06:08,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:08,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:08,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:08,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:08,206 INFO L87 Difference]: Start difference. First operand 40974 states and 64533 transitions. Second operand 3 states. [2020-07-21 21:06:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:12,467 INFO L93 Difference]: Finished difference Result 120016 states and 188732 transitions. [2020-07-21 21:06:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:12,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 21:06:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:12,551 INFO L225 Difference]: With dead ends: 120016 [2020-07-21 21:06:12,551 INFO L226 Difference]: Without dead ends: 79820 [2020-07-21 21:06:12,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 21:06:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79820 states. [2020-07-21 21:06:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79820 to 79818. [2020-07-21 21:06:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79818 states. [2020-07-21 21:06:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79818 states to 79818 states and 124923 transitions. [2020-07-21 21:06:16,228 INFO L78 Accepts]: Start accepts. Automaton has 79818 states and 124923 transitions. Word has length 335 [2020-07-21 21:06:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:16,228 INFO L479 AbstractCegarLoop]: Abstraction has 79818 states and 124923 transitions. [2020-07-21 21:06:16,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:16,228 INFO L276 IsEmpty]: Start isEmpty. Operand 79818 states and 124923 transitions. [2020-07-21 21:06:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 21:06:16,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:16,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:16,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:16,485 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:16,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:16,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1360763581, now seen corresponding path program 1 times [2020-07-21 21:06:16,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:16,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200851384] [2020-07-21 21:06:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:17,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:17,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:17,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:17,063 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 21:06:17,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:17,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200851384] [2020-07-21 21:06:17,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:17,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:17,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733760247] [2020-07-21 21:06:17,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:17,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:17,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:17,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:17,065 INFO L87 Difference]: Start difference. First operand 79818 states and 124923 transitions. Second operand 3 states. [2020-07-21 21:06:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:23,216 INFO L93 Difference]: Finished difference Result 158952 states and 248141 transitions. [2020-07-21 21:06:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:23,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 21:06:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:23,321 INFO L225 Difference]: With dead ends: 158952 [2020-07-21 21:06:23,321 INFO L226 Difference]: Without dead ends: 114800 [2020-07-21 21:06:23,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 21:06:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114800 states. [2020-07-21 21:06:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114800 to 79822. [2020-07-21 21:06:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79822 states. [2020-07-21 21:06:27,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79822 states to 79822 states and 124925 transitions. [2020-07-21 21:06:27,387 INFO L78 Accepts]: Start accepts. Automaton has 79822 states and 124925 transitions. Word has length 335 [2020-07-21 21:06:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:27,387 INFO L479 AbstractCegarLoop]: Abstraction has 79822 states and 124925 transitions. [2020-07-21 21:06:27,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 79822 states and 124925 transitions. [2020-07-21 21:06:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 21:06:27,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:27,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:27,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:27,639 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:27,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:27,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1718375350, now seen corresponding path program 1 times [2020-07-21 21:06:27,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:27,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992219380] [2020-07-21 21:06:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:27,877 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:27,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:06:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:27,994 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 21:06:27,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:27,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992219380] [2020-07-21 21:06:27,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:27,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:06:27,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946951980] [2020-07-21 21:06:27,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:06:27,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:06:27,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:06:27,997 INFO L87 Difference]: Start difference. First operand 79822 states and 124925 transitions. Second operand 9 states. [2020-07-21 21:06:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:52,173 INFO L93 Difference]: Finished difference Result 390306 states and 615667 transitions. [2020-07-21 21:06:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-21 21:06:52,173 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 335 [2020-07-21 21:06:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:52,625 INFO L225 Difference]: With dead ends: 390306 [2020-07-21 21:06:52,625 INFO L226 Difference]: Without dead ends: 356652 [2020-07-21 21:06:52,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 21:06:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356652 states. [2020-07-21 21:07:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356652 to 190434. [2020-07-21 21:07:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190434 states. [2020-07-21 21:07:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190434 states to 190434 states and 299555 transitions. [2020-07-21 21:07:10,796 INFO L78 Accepts]: Start accepts. Automaton has 190434 states and 299555 transitions. Word has length 335 [2020-07-21 21:07:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:10,796 INFO L479 AbstractCegarLoop]: Abstraction has 190434 states and 299555 transitions. [2020-07-21 21:07:10,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:07:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 190434 states and 299555 transitions. [2020-07-21 21:07:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 21:07:10,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:10,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:07:11,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:11,057 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1489812399, now seen corresponding path program 1 times [2020-07-21 21:07:11,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:11,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276323411] [2020-07-21 21:07:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:11,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:07:11,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:07:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:11,371 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 21:07:11,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:11,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276323411] [2020-07-21 21:07:11,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:11,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:07:11,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481847304] [2020-07-21 21:07:11,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:07:11,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:11,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:07:11,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:07:11,374 INFO L87 Difference]: Start difference. First operand 190434 states and 299555 transitions. Second operand 3 states. [2020-07-21 21:07:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:35,467 INFO L93 Difference]: Finished difference Result 569472 states and 895515 transitions. [2020-07-21 21:07:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:07:35,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 21:07:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:36,002 INFO L225 Difference]: With dead ends: 569472 [2020-07-21 21:07:36,002 INFO L226 Difference]: Without dead ends: 379820 [2020-07-21 21:07:36,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 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 21:07:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379820 states. [2020-07-21 21:07:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379820 to 190434. [2020-07-21 21:07:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190434 states. [2020-07-21 21:07:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190434 states to 190434 states and 299551 transitions. [2020-07-21 21:07:55,101 INFO L78 Accepts]: Start accepts. Automaton has 190434 states and 299551 transitions. Word has length 335 [2020-07-21 21:07:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:55,101 INFO L479 AbstractCegarLoop]: Abstraction has 190434 states and 299551 transitions. [2020-07-21 21:07:55,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:07:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 190434 states and 299551 transitions. [2020-07-21 21:07:55,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:07:55,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:55,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:07:55,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:55,353 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1934530709, now seen corresponding path program 1 times [2020-07-21 21:07:55,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:55,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877106124] [2020-07-21 21:07:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:55,594 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:07:55,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:55,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:07:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:55,675 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 21:07:55,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:55,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877106124] [2020-07-21 21:07:55,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:55,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:07:55,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219370762] [2020-07-21 21:07:55,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:07:55,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:55,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:07:55,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:07:55,677 INFO L87 Difference]: Start difference. First operand 190434 states and 299551 transitions. Second operand 4 states. [2020-07-21 21:08:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:22,033 INFO L93 Difference]: Finished difference Result 535821 states and 841815 transitions. [2020-07-21 21:08:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:22,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 21:08:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:22,468 INFO L225 Difference]: With dead ends: 535821 [2020-07-21 21:08:22,468 INFO L226 Difference]: Without dead ends: 348035 [2020-07-21 21:08:22,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 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 21:08:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348035 states. [2020-07-21 21:08:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348035 to 186538. [2020-07-21 21:08:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186538 states. [2020-07-21 21:08:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186538 states to 186538 states and 293311 transitions. [2020-07-21 21:08:37,873 INFO L78 Accepts]: Start accepts. Automaton has 186538 states and 293311 transitions. Word has length 336 [2020-07-21 21:08:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:37,873 INFO L479 AbstractCegarLoop]: Abstraction has 186538 states and 293311 transitions. [2020-07-21 21:08:37,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 186538 states and 293311 transitions. [2020-07-21 21:08:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 21:08:37,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:37,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:08:38,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:38,125 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:38,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:38,125 INFO L82 PathProgramCache]: Analyzing trace with hash 689658759, now seen corresponding path program 1 times [2020-07-21 21:08:38,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:38,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873029420] [2020-07-21 21:08:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:38,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:08:38,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:38,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:08:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:38,476 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 21:08:38,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:38,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873029420] [2020-07-21 21:08:38,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:38,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:08:38,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392012736] [2020-07-21 21:08:38,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:08:38,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:08:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:08:38,478 INFO L87 Difference]: Start difference. First operand 186538 states and 293311 transitions. Second operand 4 states. [2020-07-21 21:09:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:04,919 INFO L93 Difference]: Finished difference Result 536023 states and 841462 transitions. [2020-07-21 21:09:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:09:04,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 21:09:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:05,397 INFO L225 Difference]: With dead ends: 536023 [2020-07-21 21:09:05,397 INFO L226 Difference]: Without dead ends: 349779 [2020-07-21 21:09:05,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 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 21:09:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349779 states. [2020-07-21 21:09:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349779 to 349777. [2020-07-21 21:09:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349777 states. [2020-07-21 21:09:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349777 states to 349777 states and 545332 transitions. [2020-07-21 21:09:36,434 INFO L78 Accepts]: Start accepts. Automaton has 349777 states and 545332 transitions. Word has length 337 [2020-07-21 21:09:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:36,434 INFO L479 AbstractCegarLoop]: Abstraction has 349777 states and 545332 transitions. [2020-07-21 21:09:36,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:09:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 349777 states and 545332 transitions. [2020-07-21 21:09:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 21:09:36,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:36,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:09:36,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:36,740 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:36,741 INFO L82 PathProgramCache]: Analyzing trace with hash 75608660, now seen corresponding path program 1 times [2020-07-21 21:09:36,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:36,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383979189] [2020-07-21 21:09:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:37,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:09:37,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:37,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:09:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:37,909 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 21:09:37,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:37,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383979189] [2020-07-21 21:09:37,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:37,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:09:37,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252123303] [2020-07-21 21:09:37,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:09:37,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:09:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:09:37,911 INFO L87 Difference]: Start difference. First operand 349777 states and 545332 transitions. Second operand 4 states. [2020-07-21 21:10:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:37,882 INFO L93 Difference]: Finished difference Result 1037724 states and 1617386 transitions. [2020-07-21 21:10:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:10:37,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 21:10:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:39,250 INFO L225 Difference]: With dead ends: 1037724 [2020-07-21 21:10:39,251 INFO L226 Difference]: Without dead ends: 688309 [2020-07-21 21:10:39,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:10:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688309 states. [2020-07-21 21:11:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688309 to 688307. [2020-07-21 21:11:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688307 states. [2020-07-21 21:11:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688307 states to 688307 states and 1068223 transitions. [2020-07-21 21:11:49,704 INFO L78 Accepts]: Start accepts. Automaton has 688307 states and 1068223 transitions. Word has length 339 [2020-07-21 21:11:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:11:49,704 INFO L479 AbstractCegarLoop]: Abstraction has 688307 states and 1068223 transitions. [2020-07-21 21:11:49,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:11:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 688307 states and 1068223 transitions. [2020-07-21 21:11:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 21:11:49,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:11:49,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:11:50,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:11:50,118 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:11:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:11:50,119 INFO L82 PathProgramCache]: Analyzing trace with hash 851061898, now seen corresponding path program 1 times [2020-07-21 21:11:50,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:11:50,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730715656] [2020-07-21 21:11:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:11:51,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:11:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:11:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:11:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:11:51,306 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 21:11:51,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:11:51,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730715656] [2020-07-21 21:11:51,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:11:51,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:11:51,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770567056] [2020-07-21 21:11:51,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:11:51,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:11:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:11:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:11:51,308 INFO L87 Difference]: Start difference. First operand 688307 states and 1068223 transitions. Second operand 3 states. [2020-07-21 21:13:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:53,817 INFO L93 Difference]: Finished difference Result 2025089 states and 3138959 transitions. [2020-07-21 21:13:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:53,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 21:13:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:55,791 INFO L225 Difference]: With dead ends: 2025089 [2020-07-21 21:13:55,791 INFO L226 Difference]: Without dead ends: 1340562 [2020-07-21 21:13:56,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340562 states.