/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:08:50,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:08:50,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:08:50,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:08:50,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:08:50,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:08:50,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:08:50,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:08:50,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:08:50,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:08:50,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:08:50,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:08:50,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:08:50,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:08:50,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:08:50,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:08:50,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:08:50,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:08:50,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:08:50,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:08:50,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:08:50,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:08:50,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:08:50,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:08:50,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 23:08:50,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:08:50,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:08:50,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:08:50,272 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 23:08:50,286 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:08:50,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:08:50,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:08:50,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:08:50,288 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:08:50,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:08:50,288 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:08:50,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:08:50,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:08:50,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:08:50,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:08:50,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:08:50,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:08:50,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:08:50,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:08:50,290 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:08:50,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:08:50,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:08:50,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:08:50,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:08:50,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:08:50,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:08:50,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:08:50,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:08:50,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:08:50,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:08:50,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:50,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:08:50,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:08:50,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 23:08:50,566 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:08:50,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:08:50,583 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:08:50,585 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:08:50,585 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:08:50,586 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 23:08:50,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbed9503e/c9c23360a7514383848b848728aff617/FLAG385154a6f [2020-07-20 23:08:51,342 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:08:51,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 23:08:51,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbed9503e/c9c23360a7514383848b848728aff617/FLAG385154a6f [2020-07-20 23:08:51,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbed9503e/c9c23360a7514383848b848728aff617 [2020-07-20 23:08:51,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:08:51,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:08:51,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:08:51,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:08:51,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:08:51,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:51" (1/1) ... [2020-07-20 23:08:51,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ad6da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:51, skipping insertion in model container [2020-07-20 23:08:51,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:51" (1/1) ... [2020-07-20 23:08:51,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:08:51,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:08:53,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:08:53,180 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:08:54,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:08:54,534 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:08:54,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54 WrapperNode [2020-07-20 23:08:54,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:08:54,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:08:54,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:08:54,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:08:54,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... [2020-07-20 23:08:54,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... [2020-07-20 23:08:54,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... [2020-07-20 23:08:54,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... [2020-07-20 23:08:54,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... [2020-07-20 23:08:54,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... [2020-07-20 23:08:54,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... [2020-07-20 23:08:54,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:08:54,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:08:54,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:08:54,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:08:54,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:08:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:08:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:08:54,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:08:54,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:08:54,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:08:54,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:08:54,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 23:08:54,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:08:54,831 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:08:54,831 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:08:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:08:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:08:54,832 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:08:54,833 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:08:54,833 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:08:54,833 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:08:54,833 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:08:54,834 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:08:54,834 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:08:54,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:08:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:08:54,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:08:58,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:08:58,165 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:08:58,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:58 BoogieIcfgContainer [2020-07-20 23:08:58,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:08:58,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:08:58,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:08:58,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:08:58,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:08:51" (1/3) ... [2020-07-20 23:08:58,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ac055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:58, skipping insertion in model container [2020-07-20 23:08:58,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:54" (2/3) ... [2020-07-20 23:08:58,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ac055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:58, skipping insertion in model container [2020-07-20 23:08:58,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:58" (3/3) ... [2020-07-20 23:08:58,197 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 23:08:58,210 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:08:58,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-07-20 23:08:58,241 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-07-20 23:08:58,278 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:08:58,279 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:08:58,279 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:08:58,279 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:08:58,279 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:08:58,279 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:08:58,280 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:08:58,280 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:08:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states. [2020-07-20 23:08:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 23:08:58,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:58,380 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] [2020-07-20 23:08:58,380 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times [2020-07-20 23:08:58,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:58,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896226541] [2020-07-20 23:08:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:58,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:08:58,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:58,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:08:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:08:59,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:59,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896226541] [2020-07-20 23:08:59,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:59,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:59,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568745268] [2020-07-20 23:08:59,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:59,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:59,228 INFO L87 Difference]: Start difference. First operand 1027 states. Second operand 4 states. [2020-07-20 23:08:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:59,749 INFO L93 Difference]: Finished difference Result 3017 states and 5407 transitions. [2020-07-20 23:08:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:08:59,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-20 23:08:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:59,804 INFO L225 Difference]: With dead ends: 3017 [2020-07-20 23:08:59,804 INFO L226 Difference]: Without dead ends: 1999 [2020-07-20 23:08:59,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:08:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2020-07-20 23:08:59,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1925. [2020-07-20 23:08:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2020-07-20 23:08:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2919 transitions. [2020-07-20 23:08:59,988 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2919 transitions. Word has length 327 [2020-07-20 23:08:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:59,990 INFO L479 AbstractCegarLoop]: Abstraction has 1925 states and 2919 transitions. [2020-07-20 23:08:59,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2919 transitions. [2020-07-20 23:08:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 23:09:00,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:00,000 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] [2020-07-20 23:09:00,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:00,214 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash 14058356, now seen corresponding path program 1 times [2020-07-20 23:09:00,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:00,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095743720] [2020-07-20 23:09:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:00,633 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:09:00,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:00,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:00,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:00,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095743720] [2020-07-20 23:09:00,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:00,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:00,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429471359] [2020-07-20 23:09:00,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:00,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:00,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:00,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:00,786 INFO L87 Difference]: Start difference. First operand 1925 states and 2919 transitions. Second operand 3 states. [2020-07-20 23:09:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:01,022 INFO L93 Difference]: Finished difference Result 5567 states and 8399 transitions. [2020-07-20 23:09:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:01,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-20 23:09:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:01,041 INFO L225 Difference]: With dead ends: 5567 [2020-07-20 23:09:01,042 INFO L226 Difference]: Without dead ends: 3744 [2020-07-20 23:09:01,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3744 states. [2020-07-20 23:09:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3744 to 3678. [2020-07-20 23:09:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3678 states. [2020-07-20 23:09:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 5560 transitions. [2020-07-20 23:09:01,226 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 5560 transitions. Word has length 329 [2020-07-20 23:09:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:01,227 INFO L479 AbstractCegarLoop]: Abstraction has 3678 states and 5560 transitions. [2020-07-20 23:09:01,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 5560 transitions. [2020-07-20 23:09:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 23:09:01,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:01,240 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] [2020-07-20 23:09:01,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:01,453 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:01,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:01,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1471558479, now seen corresponding path program 1 times [2020-07-20 23:09:01,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:01,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341929550] [2020-07-20 23:09:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:01,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:01,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:01,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:01,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341929550] [2020-07-20 23:09:01,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:01,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:01,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466812635] [2020-07-20 23:09:01,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:01,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:01,835 INFO L87 Difference]: Start difference. First operand 3678 states and 5560 transitions. Second operand 3 states. [2020-07-20 23:09:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:02,064 INFO L93 Difference]: Finished difference Result 11002 states and 16631 transitions. [2020-07-20 23:09:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:02,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-20 23:09:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:02,099 INFO L225 Difference]: With dead ends: 11002 [2020-07-20 23:09:02,099 INFO L226 Difference]: Without dead ends: 7339 [2020-07-20 23:09:02,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7339 states. [2020-07-20 23:09:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7339 to 3689. [2020-07-20 23:09:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3689 states. [2020-07-20 23:09:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 5576 transitions. [2020-07-20 23:09:02,364 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 5576 transitions. Word has length 329 [2020-07-20 23:09:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:02,364 INFO L479 AbstractCegarLoop]: Abstraction has 3689 states and 5576 transitions. [2020-07-20 23:09:02,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 5576 transitions. [2020-07-20 23:09:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:09:02,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:02,377 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] [2020-07-20 23:09:02,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:02,591 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1886227890, now seen corresponding path program 1 times [2020-07-20 23:09:02,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:02,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188159543] [2020-07-20 23:09:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:02,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:09:02,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:02,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:02,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188159543] [2020-07-20 23:09:02,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:02,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:02,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169931395] [2020-07-20 23:09:02,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:02,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:02,957 INFO L87 Difference]: Start difference. First operand 3689 states and 5576 transitions. Second operand 3 states. [2020-07-20 23:09:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:03,217 INFO L93 Difference]: Finished difference Result 10959 states and 16549 transitions. [2020-07-20 23:09:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:03,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 23:09:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:03,250 INFO L225 Difference]: With dead ends: 10959 [2020-07-20 23:09:03,251 INFO L226 Difference]: Without dead ends: 7300 [2020-07-20 23:09:03,260 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 [2020-07-20 23:09:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7300 states. [2020-07-20 23:09:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7300 to 3699. [2020-07-20 23:09:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3699 states. [2020-07-20 23:09:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5590 transitions. [2020-07-20 23:09:03,440 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5590 transitions. Word has length 330 [2020-07-20 23:09:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:03,441 INFO L479 AbstractCegarLoop]: Abstraction has 3699 states and 5590 transitions. [2020-07-20 23:09:03,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5590 transitions. [2020-07-20 23:09:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:09:03,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:03,450 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] [2020-07-20 23:09:03,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:03,665 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:03,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1551869625, now seen corresponding path program 1 times [2020-07-20 23:09:03,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:03,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751783694] [2020-07-20 23:09:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:04,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:09:04,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:04,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:09:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:04,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:04,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751783694] [2020-07-20 23:09:04,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:04,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:09:04,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066143320] [2020-07-20 23:09:04,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:09:04,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:09:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:09:04,087 INFO L87 Difference]: Start difference. First operand 3699 states and 5590 transitions. Second operand 4 states. [2020-07-20 23:09:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:04,424 INFO L93 Difference]: Finished difference Result 8155 states and 12318 transitions. [2020-07-20 23:09:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:09:04,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 23:09:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:04,445 INFO L225 Difference]: With dead ends: 8155 [2020-07-20 23:09:04,446 INFO L226 Difference]: Without dead ends: 4144 [2020-07-20 23:09:04,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:09:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2020-07-20 23:09:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4078. [2020-07-20 23:09:04,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4078 states. [2020-07-20 23:09:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 6143 transitions. [2020-07-20 23:09:04,675 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 6143 transitions. Word has length 331 [2020-07-20 23:09:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:04,676 INFO L479 AbstractCegarLoop]: Abstraction has 4078 states and 6143 transitions. [2020-07-20 23:09:04,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:09:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 6143 transitions. [2020-07-20 23:09:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:09:04,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:04,686 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] [2020-07-20 23:09:04,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:04,901 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:04,902 INFO L82 PathProgramCache]: Analyzing trace with hash -34914956, now seen corresponding path program 1 times [2020-07-20 23:09:04,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:04,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835666141] [2020-07-20 23:09:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:05,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:09:05,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:05,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:05,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835666141] [2020-07-20 23:09:05,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:05,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:05,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666359037] [2020-07-20 23:09:05,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:05,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:05,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:05,343 INFO L87 Difference]: Start difference. First operand 4078 states and 6143 transitions. Second operand 3 states. [2020-07-20 23:09:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:05,679 INFO L93 Difference]: Finished difference Result 11805 states and 17703 transitions. [2020-07-20 23:09:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:05,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 23:09:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:05,699 INFO L225 Difference]: With dead ends: 11805 [2020-07-20 23:09:05,699 INFO L226 Difference]: Without dead ends: 8012 [2020-07-20 23:09:05,710 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 [2020-07-20 23:09:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2020-07-20 23:09:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 7818. [2020-07-20 23:09:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7818 states. [2020-07-20 23:09:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7818 states to 7818 states and 11754 transitions. [2020-07-20 23:09:06,049 INFO L78 Accepts]: Start accepts. Automaton has 7818 states and 11754 transitions. Word has length 332 [2020-07-20 23:09:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:06,050 INFO L479 AbstractCegarLoop]: Abstraction has 7818 states and 11754 transitions. [2020-07-20 23:09:06,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7818 states and 11754 transitions. [2020-07-20 23:09:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:09:06,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:06,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:06,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:06,283 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:06,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:06,284 INFO L82 PathProgramCache]: Analyzing trace with hash -914747079, now seen corresponding path program 1 times [2020-07-20 23:09:06,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:06,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916036608] [2020-07-20 23:09:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:06,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:09:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:06,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:06,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916036608] [2020-07-20 23:09:06,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:06,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:09:06,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507480473] [2020-07-20 23:09:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:09:06,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:09:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:09:06,674 INFO L87 Difference]: Start difference. First operand 7818 states and 11754 transitions. Second operand 4 states. [2020-07-20 23:09:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:07,334 INFO L93 Difference]: Finished difference Result 22284 states and 33270 transitions. [2020-07-20 23:09:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:09:07,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 23:09:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:07,369 INFO L225 Difference]: With dead ends: 22284 [2020-07-20 23:09:07,369 INFO L226 Difference]: Without dead ends: 15136 [2020-07-20 23:09:07,384 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 [2020-07-20 23:09:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15136 states. [2020-07-20 23:09:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15136 to 8243. [2020-07-20 23:09:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8243 states. [2020-07-20 23:09:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 12462 transitions. [2020-07-20 23:09:07,722 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 12462 transitions. Word has length 332 [2020-07-20 23:09:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:07,723 INFO L479 AbstractCegarLoop]: Abstraction has 8243 states and 12462 transitions. [2020-07-20 23:09:07,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:09:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 12462 transitions. [2020-07-20 23:09:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 23:09:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:07,739 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] [2020-07-20 23:09:07,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:07,952 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:07,952 INFO L82 PathProgramCache]: Analyzing trace with hash -892315555, now seen corresponding path program 1 times [2020-07-20 23:09:07,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:07,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485564401] [2020-07-20 23:09:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:08,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:08,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:08,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:08,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:08,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:08,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485564401] [2020-07-20 23:09:08,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:08,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:08,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305059220] [2020-07-20 23:09:08,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:08,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:08,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:08,317 INFO L87 Difference]: Start difference. First operand 8243 states and 12462 transitions. Second operand 3 states. [2020-07-20 23:09:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:08,836 INFO L93 Difference]: Finished difference Result 24370 states and 36797 transitions. [2020-07-20 23:09:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:08,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 23:09:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:08,875 INFO L225 Difference]: With dead ends: 24370 [2020-07-20 23:09:08,875 INFO L226 Difference]: Without dead ends: 16302 [2020-07-20 23:09:08,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16302 states. [2020-07-20 23:09:09,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16302 to 8327. [2020-07-20 23:09:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8327 states. [2020-07-20 23:09:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8327 states to 8327 states and 12573 transitions. [2020-07-20 23:09:09,267 INFO L78 Accepts]: Start accepts. Automaton has 8327 states and 12573 transitions. Word has length 333 [2020-07-20 23:09:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:09,268 INFO L479 AbstractCegarLoop]: Abstraction has 8327 states and 12573 transitions. [2020-07-20 23:09:09,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 8327 states and 12573 transitions. [2020-07-20 23:09:09,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 23:09:09,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:09,279 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] [2020-07-20 23:09:09,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:09,480 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:09,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:09,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1056909573, now seen corresponding path program 1 times [2020-07-20 23:09:09,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:09,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654292169] [2020-07-20 23:09:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:09,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:09:09,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:09,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:09,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654292169] [2020-07-20 23:09:09,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:09,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:09:09,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208834409] [2020-07-20 23:09:09,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:09:09,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:09,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:09:09,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:09:09,934 INFO L87 Difference]: Start difference. First operand 8327 states and 12573 transitions. Second operand 9 states. [2020-07-20 23:09:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:18,889 INFO L93 Difference]: Finished difference Result 43425 states and 65617 transitions. [2020-07-20 23:09:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 23:09:18,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 333 [2020-07-20 23:09:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:18,993 INFO L225 Difference]: With dead ends: 43425 [2020-07-20 23:09:18,993 INFO L226 Difference]: Without dead ends: 41579 [2020-07-20 23:09:19,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 23:09:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41579 states. [2020-07-20 23:09:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41579 to 19077. [2020-07-20 23:09:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19077 states. [2020-07-20 23:09:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19077 states to 19077 states and 28919 transitions. [2020-07-20 23:09:20,074 INFO L78 Accepts]: Start accepts. Automaton has 19077 states and 28919 transitions. Word has length 333 [2020-07-20 23:09:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:20,074 INFO L479 AbstractCegarLoop]: Abstraction has 19077 states and 28919 transitions. [2020-07-20 23:09:20,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:09:20,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19077 states and 28919 transitions. [2020-07-20 23:09:20,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 23:09:20,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:20,091 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] [2020-07-20 23:09:20,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:20,299 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2023771322, now seen corresponding path program 1 times [2020-07-20 23:09:20,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:20,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670027441] [2020-07-20 23:09:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:20,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:09:20,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:20,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:20,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:20,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670027441] [2020-07-20 23:09:20,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:20,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:20,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399917537] [2020-07-20 23:09:20,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:20,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:20,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:20,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:20,693 INFO L87 Difference]: Start difference. First operand 19077 states and 28919 transitions. Second operand 3 states. [2020-07-20 23:09:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:22,384 INFO L93 Difference]: Finished difference Result 40801 states and 62184 transitions. [2020-07-20 23:09:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:22,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 23:09:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:22,429 INFO L225 Difference]: With dead ends: 40801 [2020-07-20 23:09:22,429 INFO L226 Difference]: Without dead ends: 24367 [2020-07-20 23:09:22,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:22,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24367 states. [2020-07-20 23:09:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24367 to 22117. [2020-07-20 23:09:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22117 states. [2020-07-20 23:09:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22117 states to 22117 states and 33901 transitions. [2020-07-20 23:09:23,331 INFO L78 Accepts]: Start accepts. Automaton has 22117 states and 33901 transitions. Word has length 333 [2020-07-20 23:09:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:23,331 INFO L479 AbstractCegarLoop]: Abstraction has 22117 states and 33901 transitions. [2020-07-20 23:09:23,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22117 states and 33901 transitions. [2020-07-20 23:09:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:09:23,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:23,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:23,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:23,551 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash -76386158, now seen corresponding path program 1 times [2020-07-20 23:09:23,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:23,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573387247] [2020-07-20 23:09:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:23,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:24,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:24,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573387247] [2020-07-20 23:09:24,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:24,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:24,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967227584] [2020-07-20 23:09:24,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:24,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:24,005 INFO L87 Difference]: Start difference. First operand 22117 states and 33901 transitions. Second operand 3 states. [2020-07-20 23:09:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:26,078 INFO L93 Difference]: Finished difference Result 63981 states and 97676 transitions. [2020-07-20 23:09:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:26,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 23:09:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:26,133 INFO L225 Difference]: With dead ends: 63981 [2020-07-20 23:09:26,133 INFO L226 Difference]: Without dead ends: 43060 [2020-07-20 23:09:26,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43060 states. [2020-07-20 23:09:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43060 to 22266. [2020-07-20 23:09:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22266 states. [2020-07-20 23:09:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22266 states to 22266 states and 34095 transitions. [2020-07-20 23:09:27,119 INFO L78 Accepts]: Start accepts. Automaton has 22266 states and 34095 transitions. Word has length 334 [2020-07-20 23:09:27,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:27,120 INFO L479 AbstractCegarLoop]: Abstraction has 22266 states and 34095 transitions. [2020-07-20 23:09:27,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22266 states and 34095 transitions. [2020-07-20 23:09:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:09:27,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:27,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:27,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:27,341 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -620527226, now seen corresponding path program 1 times [2020-07-20 23:09:27,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:27,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031030636] [2020-07-20 23:09:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:27,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:09:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:27,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:27,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:27,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031030636] [2020-07-20 23:09:27,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:27,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:27,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127299439] [2020-07-20 23:09:27,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:27,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:27,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:27,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:27,816 INFO L87 Difference]: Start difference. First operand 22266 states and 34095 transitions. Second operand 3 states. [2020-07-20 23:09:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:29,481 INFO L93 Difference]: Finished difference Result 66273 states and 101464 transitions. [2020-07-20 23:09:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:29,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 23:09:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:29,526 INFO L225 Difference]: With dead ends: 66273 [2020-07-20 23:09:29,526 INFO L226 Difference]: Without dead ends: 44291 [2020-07-20 23:09:29,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44291 states. [2020-07-20 23:09:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44291 to 22356. [2020-07-20 23:09:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22356 states. [2020-07-20 23:09:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22356 states to 22356 states and 34213 transitions. [2020-07-20 23:09:30,576 INFO L78 Accepts]: Start accepts. Automaton has 22356 states and 34213 transitions. Word has length 334 [2020-07-20 23:09:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:30,576 INFO L479 AbstractCegarLoop]: Abstraction has 22356 states and 34213 transitions. [2020-07-20 23:09:30,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22356 states and 34213 transitions. [2020-07-20 23:09:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:09:30,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:30,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:30,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:30,792 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:30,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1020684225, now seen corresponding path program 1 times [2020-07-20 23:09:30,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:30,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457543555] [2020-07-20 23:09:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:31,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:09:31,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:31,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:31,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457543555] [2020-07-20 23:09:31,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:31,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:31,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749859519] [2020-07-20 23:09:31,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:31,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:31,231 INFO L87 Difference]: Start difference. First operand 22356 states and 34213 transitions. Second operand 3 states. [2020-07-20 23:09:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:32,889 INFO L93 Difference]: Finished difference Result 66162 states and 101154 transitions. [2020-07-20 23:09:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:32,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 23:09:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:32,938 INFO L225 Difference]: With dead ends: 66162 [2020-07-20 23:09:32,938 INFO L226 Difference]: Without dead ends: 44309 [2020-07-20 23:09:32,969 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 [2020-07-20 23:09:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44309 states. [2020-07-20 23:09:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44309 to 22356. [2020-07-20 23:09:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22356 states. [2020-07-20 23:09:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22356 states to 22356 states and 34207 transitions. [2020-07-20 23:09:35,041 INFO L78 Accepts]: Start accepts. Automaton has 22356 states and 34207 transitions. Word has length 335 [2020-07-20 23:09:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:35,041 INFO L479 AbstractCegarLoop]: Abstraction has 22356 states and 34207 transitions. [2020-07-20 23:09:35,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 22356 states and 34207 transitions. [2020-07-20 23:09:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:09:35,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:35,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:35,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:35,262 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:35,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:35,263 INFO L82 PathProgramCache]: Analyzing trace with hash 358737003, now seen corresponding path program 1 times [2020-07-20 23:09:35,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:35,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371278260] [2020-07-20 23:09:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:35,598 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:09:35,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:35,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:35,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:35,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:35,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371278260] [2020-07-20 23:09:35,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:35,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:35,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111809757] [2020-07-20 23:09:35,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:35,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:35,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:35,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:35,695 INFO L87 Difference]: Start difference. First operand 22356 states and 34207 transitions. Second operand 3 states. [2020-07-20 23:09:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:37,370 INFO L93 Difference]: Finished difference Result 52800 states and 81642 transitions. [2020-07-20 23:09:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:37,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 23:09:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:37,405 INFO L225 Difference]: With dead ends: 52800 [2020-07-20 23:09:37,406 INFO L226 Difference]: Without dead ends: 33548 [2020-07-20 23:09:37,421 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 [2020-07-20 23:09:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33548 states. [2020-07-20 23:09:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33548 to 29158. [2020-07-20 23:09:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29158 states. [2020-07-20 23:09:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29158 states to 29158 states and 45307 transitions. [2020-07-20 23:09:38,735 INFO L78 Accepts]: Start accepts. Automaton has 29158 states and 45307 transitions. Word has length 335 [2020-07-20 23:09:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:38,736 INFO L479 AbstractCegarLoop]: Abstraction has 29158 states and 45307 transitions. [2020-07-20 23:09:38,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29158 states and 45307 transitions. [2020-07-20 23:09:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:09:38,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:38,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:38,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:38,970 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash 31916167, now seen corresponding path program 1 times [2020-07-20 23:09:38,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:38,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566604371] [2020-07-20 23:09:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:39,316 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:09:39,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:39,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:39,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:39,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566604371] [2020-07-20 23:09:39,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:39,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:39,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374765572] [2020-07-20 23:09:39,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:39,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:39,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:39,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:39,469 INFO L87 Difference]: Start difference. First operand 29158 states and 45307 transitions. Second operand 3 states. [2020-07-20 23:09:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:42,284 INFO L93 Difference]: Finished difference Result 84415 states and 130911 transitions. [2020-07-20 23:09:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:42,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 23:09:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:42,343 INFO L225 Difference]: With dead ends: 84415 [2020-07-20 23:09:42,343 INFO L226 Difference]: Without dead ends: 56501 [2020-07-20 23:09:42,368 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 [2020-07-20 23:09:42,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56501 states. [2020-07-20 23:09:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56501 to 56443. [2020-07-20 23:09:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56443 states. [2020-07-20 23:09:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56443 states to 56443 states and 87144 transitions. [2020-07-20 23:09:46,470 INFO L78 Accepts]: Start accepts. Automaton has 56443 states and 87144 transitions. Word has length 335 [2020-07-20 23:09:46,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:46,470 INFO L479 AbstractCegarLoop]: Abstraction has 56443 states and 87144 transitions. [2020-07-20 23:09:46,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 56443 states and 87144 transitions. [2020-07-20 23:09:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:09:46,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:46,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:46,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:46,705 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:46,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2107484237, now seen corresponding path program 1 times [2020-07-20 23:09:46,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:46,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040188914] [2020-07-20 23:09:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:46,992 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:46,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:09:47,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:47,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:47,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040188914] [2020-07-20 23:09:47,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:47,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:09:47,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984959223] [2020-07-20 23:09:47,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:09:47,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:09:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:09:47,059 INFO L87 Difference]: Start difference. First operand 56443 states and 87144 transitions. Second operand 4 states. [2020-07-20 23:09:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:52,151 INFO L93 Difference]: Finished difference Result 159858 states and 246431 transitions. [2020-07-20 23:09:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:09:52,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 23:09:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:52,264 INFO L225 Difference]: With dead ends: 159858 [2020-07-20 23:09:52,265 INFO L226 Difference]: Without dead ends: 105637 [2020-07-20 23:09:52,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:09:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105637 states. [2020-07-20 23:09:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105637 to 56846. [2020-07-20 23:09:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56846 states. [2020-07-20 23:09:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56846 states to 56846 states and 87829 transitions. [2020-07-20 23:09:57,339 INFO L78 Accepts]: Start accepts. Automaton has 56846 states and 87829 transitions. Word has length 335 [2020-07-20 23:09:57,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:57,339 INFO L479 AbstractCegarLoop]: Abstraction has 56846 states and 87829 transitions. [2020-07-20 23:09:57,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:09:57,339 INFO L276 IsEmpty]: Start isEmpty. Operand 56846 states and 87829 transitions. [2020-07-20 23:09:57,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 23:09:57,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:57,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:09:57,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:57,579 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:57,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1651481622, now seen corresponding path program 1 times [2020-07-20 23:09:57,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:57,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454230720] [2020-07-20 23:09:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:57,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:09:57,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:09:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:58,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:58,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454230720] [2020-07-20 23:09:58,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:58,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:09:58,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903063019] [2020-07-20 23:09:58,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:09:58,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:09:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:09:58,043 INFO L87 Difference]: Start difference. First operand 56846 states and 87829 transitions. Second operand 4 states. [2020-07-20 23:10:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:04,028 INFO L93 Difference]: Finished difference Result 167056 states and 257839 transitions. [2020-07-20 23:10:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:10:04,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-20 23:10:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:04,188 INFO L225 Difference]: With dead ends: 167056 [2020-07-20 23:10:04,189 INFO L226 Difference]: Without dead ends: 110724 [2020-07-20 23:10:04,241 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 [2020-07-20 23:10:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110724 states. [2020-07-20 23:10:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110724 to 110230. [2020-07-20 23:10:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110230 states. [2020-07-20 23:10:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110230 states to 110230 states and 169113 transitions. [2020-07-20 23:10:12,785 INFO L78 Accepts]: Start accepts. Automaton has 110230 states and 169113 transitions. Word has length 336 [2020-07-20 23:10:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:12,785 INFO L479 AbstractCegarLoop]: Abstraction has 110230 states and 169113 transitions. [2020-07-20 23:10:12,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:10:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 110230 states and 169113 transitions. [2020-07-20 23:10:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 23:10:12,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:12,828 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] [2020-07-20 23:10:13,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:13,029 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:13,030 INFO L82 PathProgramCache]: Analyzing trace with hash -943355564, now seen corresponding path program 1 times [2020-07-20 23:10:13,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:13,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195130152] [2020-07-20 23:10:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:13,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:10:13,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:13,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:13,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:13,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:13,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195130152] [2020-07-20 23:10:13,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:13,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:13,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746558681] [2020-07-20 23:10:13,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:13,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:13,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:13,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:13,583 INFO L87 Difference]: Start difference. First operand 110230 states and 169113 transitions. Second operand 3 states. [2020-07-20 23:10:27,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:27,249 INFO L93 Difference]: Finished difference Result 322885 states and 494427 transitions. [2020-07-20 23:10:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:10:27,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-20 23:10:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:27,500 INFO L225 Difference]: With dead ends: 322885 [2020-07-20 23:10:27,501 INFO L226 Difference]: Without dead ends: 216442 [2020-07-20 23:10:27,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216442 states. [2020-07-20 23:10:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216442 to 110901. [2020-07-20 23:10:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110901 states. [2020-07-20 23:10:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110901 states to 110901 states and 169926 transitions. [2020-07-20 23:10:35,147 INFO L78 Accepts]: Start accepts. Automaton has 110901 states and 169926 transitions. Word has length 337 [2020-07-20 23:10:35,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:35,147 INFO L479 AbstractCegarLoop]: Abstraction has 110901 states and 169926 transitions. [2020-07-20 23:10:35,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:10:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 110901 states and 169926 transitions. [2020-07-20 23:10:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:10:35,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:35,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:35,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:35,391 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash -374850300, now seen corresponding path program 1 times [2020-07-20 23:10:35,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:35,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837530042] [2020-07-20 23:10:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:35,679 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:10:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:35,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:10:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:35,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:35,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837530042] [2020-07-20 23:10:35,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:35,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:10:35,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914037347] [2020-07-20 23:10:35,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:10:35,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:10:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:10:35,735 INFO L87 Difference]: Start difference. First operand 110901 states and 169926 transitions. Second operand 4 states. [2020-07-20 23:10:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:50,613 INFO L93 Difference]: Finished difference Result 324912 states and 497556 transitions. [2020-07-20 23:10:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:10:50,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-20 23:10:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:50,870 INFO L225 Difference]: With dead ends: 324912 [2020-07-20 23:10:50,870 INFO L226 Difference]: Without dead ends: 218536 [2020-07-20 23:10:50,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:10:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218536 states. [2020-07-20 23:10:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218536 to 113598. [2020-07-20 23:10:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113598 states. [2020-07-20 23:10:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113598 states to 113598 states and 174124 transitions. [2020-07-20 23:10:59,085 INFO L78 Accepts]: Start accepts. Automaton has 113598 states and 174124 transitions. Word has length 338 [2020-07-20 23:10:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:59,085 INFO L479 AbstractCegarLoop]: Abstraction has 113598 states and 174124 transitions. [2020-07-20 23:10:59,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:10:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 113598 states and 174124 transitions. [2020-07-20 23:10:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:10:59,137 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:59,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:10:59,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:59,338 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash 171926393, now seen corresponding path program 1 times [2020-07-20 23:10:59,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:59,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367715029] [2020-07-20 23:10:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:59,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:10:59,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:10:59,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:10:59,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:59,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367715029] [2020-07-20 23:10:59,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:59,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:10:59,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259344019] [2020-07-20 23:10:59,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:10:59,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:10:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:10:59,778 INFO L87 Difference]: Start difference. First operand 113598 states and 174124 transitions. Second operand 3 states. [2020-07-20 23:11:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:15,835 INFO L93 Difference]: Finished difference Result 326415 states and 498868 transitions. [2020-07-20 23:11:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:11:15,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 23:11:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:16,160 INFO L225 Difference]: With dead ends: 326415 [2020-07-20 23:11:16,160 INFO L226 Difference]: Without dead ends: 219107 [2020-07-20 23:11:16,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219107 states. [2020-07-20 23:11:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219107 to 218645. [2020-07-20 23:11:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218645 states. [2020-07-20 23:11:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218645 states to 218645 states and 332105 transitions. [2020-07-20 23:11:34,560 INFO L78 Accepts]: Start accepts. Automaton has 218645 states and 332105 transitions. Word has length 338 [2020-07-20 23:11:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:34,561 INFO L479 AbstractCegarLoop]: Abstraction has 218645 states and 332105 transitions. [2020-07-20 23:11:34,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:11:34,561 INFO L276 IsEmpty]: Start isEmpty. Operand 218645 states and 332105 transitions. [2020-07-20 23:11:34,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 23:11:34,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:34,666 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] [2020-07-20 23:11:34,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:34,867 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1049649648, now seen corresponding path program 1 times [2020-07-20 23:11:34,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:34,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542698082] [2020-07-20 23:11:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:35,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:35,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:11:35,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:11:35,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:35,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542698082] [2020-07-20 23:11:35,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:35,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:11:35,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522575740] [2020-07-20 23:11:35,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:11:35,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:11:35,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:11:35,604 INFO L87 Difference]: Start difference. First operand 218645 states and 332105 transitions. Second operand 4 states. [2020-07-20 23:11:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:54,152 INFO L93 Difference]: Finished difference Result 427326 states and 648852 transitions. [2020-07-20 23:11:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:54,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-20 23:11:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:54,474 INFO L225 Difference]: With dead ends: 427326 [2020-07-20 23:11:54,475 INFO L226 Difference]: Without dead ends: 215333 [2020-07-20 23:11:54,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:11:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215333 states. [2020-07-20 23:12:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215333 to 215143. [2020-07-20 23:12:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215143 states. [2020-07-20 23:12:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215143 states to 215143 states and 326888 transitions. [2020-07-20 23:12:14,296 INFO L78 Accepts]: Start accepts. Automaton has 215143 states and 326888 transitions. Word has length 339 [2020-07-20 23:12:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:14,296 INFO L479 AbstractCegarLoop]: Abstraction has 215143 states and 326888 transitions. [2020-07-20 23:12:14,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:12:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 215143 states and 326888 transitions. [2020-07-20 23:12:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 23:12:14,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:14,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:12:14,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:14,601 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:14,602 INFO L82 PathProgramCache]: Analyzing trace with hash -710836588, now seen corresponding path program 1 times [2020-07-20 23:12:14,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:14,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581903907] [2020-07-20 23:12:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:14,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:12:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:12:14,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:12:14,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:14,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581903907] [2020-07-20 23:12:14,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:14,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:12:14,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764139552] [2020-07-20 23:12:14,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:12:14,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:14,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:12:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:12:14,980 INFO L87 Difference]: Start difference. First operand 215143 states and 326888 transitions. Second operand 4 states. [2020-07-20 23:12:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:31,615 INFO L93 Difference]: Finished difference Result 443515 states and 672476 transitions. [2020-07-20 23:12:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:12:31,617 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 23:12:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:31,907 INFO L225 Difference]: With dead ends: 443515 [2020-07-20 23:12:31,908 INFO L226 Difference]: Without dead ends: 222846 [2020-07-20 23:12:32,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:12:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222846 states. [2020-07-20 23:12:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222846 to 222292. [2020-07-20 23:12:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222292 states. [2020-07-20 23:12:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222292 states to 222292 states and 334932 transitions. [2020-07-20 23:12:52,103 INFO L78 Accepts]: Start accepts. Automaton has 222292 states and 334932 transitions. Word has length 340 [2020-07-20 23:12:52,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:52,103 INFO L479 AbstractCegarLoop]: Abstraction has 222292 states and 334932 transitions. [2020-07-20 23:12:52,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:12:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 222292 states and 334932 transitions. [2020-07-20 23:12:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 23:12:52,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:52,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (23)] Forcibly destroying the process [2020-07-20 23:12:52,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:52,813 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash 971599287, now seen corresponding path program 1 times [2020-07-20 23:12:52,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:52,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349323751] [2020-07-20 23:12:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:53,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:12:53,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:53,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:12:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:12:53,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:53,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349323751] [2020-07-20 23:12:53,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:53,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:12:53,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696091345] [2020-07-20 23:12:53,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:12:53,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:53,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:12:53,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:53,260 INFO L87 Difference]: Start difference. First operand 222292 states and 334932 transitions. Second operand 3 states. [2020-07-20 23:13:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:13:27,079 INFO L93 Difference]: Finished difference Result 641961 states and 965805 transitions. [2020-07-20 23:13:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:13:27,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 23:13:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:13:27,788 INFO L225 Difference]: With dead ends: 641961 [2020-07-20 23:13:27,789 INFO L226 Difference]: Without dead ends: 430243 [2020-07-20 23:13:28,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:13:28,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430243 states. [2020-07-20 23:14:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430243 to 428435. [2020-07-20 23:14:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428435 states. [2020-07-20 23:14:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428435 states to 428435 states and 642053 transitions. [2020-07-20 23:14:07,702 INFO L78 Accepts]: Start accepts. Automaton has 428435 states and 642053 transitions. Word has length 342 [2020-07-20 23:14:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:14:07,702 INFO L479 AbstractCegarLoop]: Abstraction has 428435 states and 642053 transitions. [2020-07-20 23:14:07,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:14:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 428435 states and 642053 transitions. [2020-07-20 23:14:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-20 23:14:07,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:14:07,951 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:14:08,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:14:08,152 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:14:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:14:08,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1823515789, now seen corresponding path program 1 times [2020-07-20 23:14:08,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:14:08,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448141117] [2020-07-20 23:14:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:14:08,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:14:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:14:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:14:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:14:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:14:08,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:14:08,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448141117] [2020-07-20 23:14:08,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:14:08,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:14:08,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587723143] [2020-07-20 23:14:08,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:14:08,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:14:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:14:08,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:14:08,498 INFO L87 Difference]: Start difference. First operand 428435 states and 642053 transitions. Second operand 4 states. [2020-07-20 23:14:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:14:57,933 INFO L93 Difference]: Finished difference Result 807845 states and 1210064 transitions. [2020-07-20 23:14:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:14:57,933 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-20 23:14:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:14:58,869 INFO L225 Difference]: With dead ends: 807845 [2020-07-20 23:14:58,869 INFO L226 Difference]: Without dead ends: 611302 [2020-07-20 23:14:59,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:14:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611302 states. [2020-07-20 23:15:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611302 to 434956. [2020-07-20 23:15:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434956 states. [2020-07-20 23:15:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434956 states to 434956 states and 652185 transitions. [2020-07-20 23:15:42,426 INFO L78 Accepts]: Start accepts. Automaton has 434956 states and 652185 transitions. Word has length 343 [2020-07-20 23:15:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:15:42,426 INFO L479 AbstractCegarLoop]: Abstraction has 434956 states and 652185 transitions. [2020-07-20 23:15:42,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:15:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 434956 states and 652185 transitions. [2020-07-20 23:15:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 23:15:42,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:15:42,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (25)] Forcibly destroying the process [2020-07-20 23:15:43,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:15:43,493 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:15:43,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:15:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash -317837047, now seen corresponding path program 1 times [2020-07-20 23:15:43,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:15:43,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313662681] [2020-07-20 23:15:43,494 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:15:43,828 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:15:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:15:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:15:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:15:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:15:43,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:15:43,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313662681] [2020-07-20 23:15:43,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:15:43,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:15:43,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821876778] [2020-07-20 23:15:43,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:15:43,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:15:43,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:15:43,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:15:43,925 INFO L87 Difference]: Start difference. First operand 434956 states and 652185 transitions. Second operand 3 states. [2020-07-20 23:16:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:16:58,919 INFO L93 Difference]: Finished difference Result 1237534 states and 1850714 transitions. [2020-07-20 23:16:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:16:58,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2020-07-20 23:16:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:17:00,227 INFO L225 Difference]: With dead ends: 1237534 [2020-07-20 23:17:00,228 INFO L226 Difference]: Without dead ends: 830385 [2020-07-20 23:17:00,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:17:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830385 states. [2020-07-20 23:18:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830385 to 829955. [2020-07-20 23:18:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 829955 states. [2020-07-20 23:18:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829955 states to 829955 states and 1232823 transitions. [2020-07-20 23:18:15,924 INFO L78 Accepts]: Start accepts. Automaton has 829955 states and 1232823 transitions. Word has length 344 [2020-07-20 23:18:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:18:15,924 INFO L479 AbstractCegarLoop]: Abstraction has 829955 states and 1232823 transitions. [2020-07-20 23:18:15,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:18:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 829955 states and 1232823 transitions. [2020-07-20 23:18:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-20 23:18:28,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:18:28,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:18:28,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:18:28,998 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:18:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:18:28,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1892245872, now seen corresponding path program 1 times [2020-07-20 23:18:28,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:18:28,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075170928] [2020-07-20 23:18:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:18:29,296 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:18:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:18:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:18:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:18:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:18:29,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:18:29,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075170928] [2020-07-20 23:18:29,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:18:29,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:18:29,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083824574] [2020-07-20 23:18:29,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:18:29,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:18:29,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:18:29,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:18:29,421 INFO L87 Difference]: Start difference. First operand 829955 states and 1232823 transitions. Second operand 9 states.