/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.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 23:08:12,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 23:08:12,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 23:08:12,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 23:08:12,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 23:08:12,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 23:08:12,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 23:08:12,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 23:08:12,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 23:08:12,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 23:08:12,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 23:08:12,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 23:08:12,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 23:08:12,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 23:08:12,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 23:08:12,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 23:08:12,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 23:08:12,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 23:08:12,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 23:08:12,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 23:08:12,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 23:08:12,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 23:08:12,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 23:08:12,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 23:08:12,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 23:08:12,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 23:08:12,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 23:08:12,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 23:08:12,912 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 23:08:12,946 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 23:08:12,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 23:08:12,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 23:08:12,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 23:08:12,950 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 23:08:12,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 23:08:12,951 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 23:08:12,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 23:08:12,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 23:08:12,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 23:08:12,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 23:08:12,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 23:08:12,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 23:08:12,952 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 23:08:12,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 23:08:12,953 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 23:08:12,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 23:08:12,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 23:08:12,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 23:08:12,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 23:08:12,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 23:08:12,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 23:08:12,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 23:08:12,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 23:08:12,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 23:08:12,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 23:08:12,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:12,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 23:08:12,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 23:08:12,956 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 23:08:13,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 23:08:13,263 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 23:08:13,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 23:08:13,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 23:08:13,270 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 23:08:13,270 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 23:08:13,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d5188bc/19a30c39013c433ea49ac7dede22f9c1/FLAG1b60f5b9a [2020-07-20 23:08:14,011 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 23:08:14,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 23:08:14,031 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d5188bc/19a30c39013c433ea49ac7dede22f9c1/FLAG1b60f5b9a [2020-07-20 23:08:14,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0d5188bc/19a30c39013c433ea49ac7dede22f9c1 [2020-07-20 23:08:14,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 23:08:14,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 23:08:14,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 23:08:14,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 23:08:14,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 23:08:14,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:14" (1/1) ... [2020-07-20 23:08:14,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43513823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:14, skipping insertion in model container [2020-07-20 23:08:14,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:08:14" (1/1) ... [2020-07-20 23:08:14,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 23:08:14,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 23:08:15,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:08:15,400 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 23:08:15,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 23:08:15,928 INFO L208 MainTranslator]: Completed translation [2020-07-20 23:08:15,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15 WrapperNode [2020-07-20 23:08:15,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 23:08:15,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 23:08:15,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 23:08:15,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 23:08:15,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (1/1) ... [2020-07-20 23:08:15,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (1/1) ... [2020-07-20 23:08:15,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (1/1) ... [2020-07-20 23:08:15,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (1/1) ... [2020-07-20 23:08:16,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (1/1) ... [2020-07-20 23:08:16,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (1/1) ... [2020-07-20 23:08:16,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (1/1) ... [2020-07-20 23:08:16,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 23:08:16,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 23:08:16,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 23:08:16,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 23:08:16,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (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 23:08:16,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 23:08:16,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 23:08:16,193 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 23:08:16,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 23:08:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 23:08:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 23:08:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 23:08:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 23:08:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 23:08:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 23:08:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 23:08:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 23:08:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 23:08:16,198 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 23:08:16,198 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 23:08:16,199 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 23:08:16,199 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 23:08:16,199 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 23:08:16,199 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 23:08:16,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 23:08:16,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 23:08:18,946 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 23:08:18,946 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 23:08:18,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:18 BoogieIcfgContainer [2020-07-20 23:08:18,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 23:08:18,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 23:08:18,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 23:08:18,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 23:08:18,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:08:14" (1/3) ... [2020-07-20 23:08:18,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653dc1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:18, skipping insertion in model container [2020-07-20 23:08:18,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:08:15" (2/3) ... [2020-07-20 23:08:18,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653dc1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:08:18, skipping insertion in model container [2020-07-20 23:08:18,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:08:18" (3/3) ... [2020-07-20 23:08:18,966 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 23:08:18,976 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 23:08:18,986 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 23:08:19,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 23:08:19,031 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 23:08:19,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 23:08:19,032 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 23:08:19,032 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 23:08:19,032 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 23:08:19,032 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 23:08:19,032 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 23:08:19,033 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 23:08:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 23:08:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 23:08:19,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:19,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:08:19,099 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:19,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 23:08:19,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:19,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621884216] [2020-07-20 23:08:19,116 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 23:08:19,654 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:19,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:08:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:20,028 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 23:08:20,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:20,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621884216] [2020-07-20 23:08:20,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:20,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:20,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688031391] [2020-07-20 23:08:20,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:20,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:20,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:20,058 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-20 23:08:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:20,401 INFO L93 Difference]: Finished difference Result 2311 states and 4106 transitions. [2020-07-20 23:08:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:08:20,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 23:08:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:20,432 INFO L225 Difference]: With dead ends: 2311 [2020-07-20 23:08:20,432 INFO L226 Difference]: Without dead ends: 1535 [2020-07-20 23:08:20,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:08:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2020-07-20 23:08:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1533. [2020-07-20 23:08:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-07-20 23:08:20,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2382 transitions. [2020-07-20 23:08:20,597 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2382 transitions. Word has length 324 [2020-07-20 23:08:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:20,599 INFO L479 AbstractCegarLoop]: Abstraction has 1533 states and 2382 transitions. [2020-07-20 23:08:20,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2382 transitions. [2020-07-20 23:08:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 23:08:20,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:20,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:08:20,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:20,828 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1039151531, now seen corresponding path program 1 times [2020-07-20 23:08:20,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:20,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842598693] [2020-07-20 23:08:20,831 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 23:08:21,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:21,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:08:21,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:21,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842598693] [2020-07-20 23:08:21,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:21,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:21,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869039176] [2020-07-20 23:08:21,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:21,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:21,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:21,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:21,481 INFO L87 Difference]: Start difference. First operand 1533 states and 2382 transitions. Second operand 3 states. [2020-07-20 23:08:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:21,685 INFO L93 Difference]: Finished difference Result 4371 states and 6753 transitions. [2020-07-20 23:08:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:21,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 23:08:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:21,701 INFO L225 Difference]: With dead ends: 4371 [2020-07-20 23:08:21,702 INFO L226 Difference]: Without dead ends: 2965 [2020-07-20 23:08:21,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-07-20 23:08:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-07-20 23:08:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-07-20 23:08:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4572 transitions. [2020-07-20 23:08:21,821 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4572 transitions. Word has length 326 [2020-07-20 23:08:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:21,822 INFO L479 AbstractCegarLoop]: Abstraction has 2963 states and 4572 transitions. [2020-07-20 23:08:21,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4572 transitions. [2020-07-20 23:08:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 23:08:21,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:21,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:08:22,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:22,047 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:22,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1642540496, now seen corresponding path program 1 times [2020-07-20 23:08:22,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:22,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438422235] [2020-07-20 23:08:22,049 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 23:08:22,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:08:22,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:22,492 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 23:08:22,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:22,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438422235] [2020-07-20 23:08:22,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:22,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:22,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972909136] [2020-07-20 23:08:22,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:22,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:22,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:22,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:22,496 INFO L87 Difference]: Start difference. First operand 2963 states and 4572 transitions. Second operand 3 states. [2020-07-20 23:08:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:22,700 INFO L93 Difference]: Finished difference Result 8707 states and 13399 transitions. [2020-07-20 23:08:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:22,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 23:08:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:22,731 INFO L225 Difference]: With dead ends: 8707 [2020-07-20 23:08:22,731 INFO L226 Difference]: Without dead ends: 5838 [2020-07-20 23:08:22,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:22,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5838 states. [2020-07-20 23:08:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5838 to 2976. [2020-07-20 23:08:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2976 states. [2020-07-20 23:08:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4588 transitions. [2020-07-20 23:08:23,000 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4588 transitions. Word has length 326 [2020-07-20 23:08:23,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:23,001 INFO L479 AbstractCegarLoop]: Abstraction has 2976 states and 4588 transitions. [2020-07-20 23:08:23,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4588 transitions. [2020-07-20 23:08:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 23:08:23,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:23,010 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 23:08:23,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:23,224 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:23,225 INFO L82 PathProgramCache]: Analyzing trace with hash -668412942, now seen corresponding path program 1 times [2020-07-20 23:08:23,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:23,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417507455] [2020-07-20 23:08:23,227 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 23:08:23,578 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:23,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:23,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:23,661 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 23:08:23,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:23,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417507455] [2020-07-20 23:08:23,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:23,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:23,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676813636] [2020-07-20 23:08:23,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:23,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:23,664 INFO L87 Difference]: Start difference. First operand 2976 states and 4588 transitions. Second operand 3 states. [2020-07-20 23:08:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:23,882 INFO L93 Difference]: Finished difference Result 8732 states and 13432 transitions. [2020-07-20 23:08:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:23,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 23:08:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:23,913 INFO L225 Difference]: With dead ends: 8732 [2020-07-20 23:08:23,913 INFO L226 Difference]: Without dead ends: 5821 [2020-07-20 23:08:23,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2020-07-20 23:08:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 2992. [2020-07-20 23:08:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-07-20 23:08:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 4608 transitions. [2020-07-20 23:08:24,144 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 4608 transitions. Word has length 327 [2020-07-20 23:08:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:24,144 INFO L479 AbstractCegarLoop]: Abstraction has 2992 states and 4608 transitions. [2020-07-20 23:08:24,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:24,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 4608 transitions. [2020-07-20 23:08:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 23:08:24,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:24,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:08:24,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:24,370 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1292238374, now seen corresponding path program 1 times [2020-07-20 23:08:24,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:24,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137258584] [2020-07-20 23:08:24,371 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 23:08:24,718 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:24,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:24,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:08:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:24,873 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 23:08:24,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:24,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137258584] [2020-07-20 23:08:24,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:24,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:24,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964941297] [2020-07-20 23:08:24,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:24,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:24,877 INFO L87 Difference]: Start difference. First operand 2992 states and 4608 transitions. Second operand 4 states. [2020-07-20 23:08:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:25,248 INFO L93 Difference]: Finished difference Result 8735 states and 13425 transitions. [2020-07-20 23:08:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:08:25,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 23:08:25,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:25,278 INFO L225 Difference]: With dead ends: 8735 [2020-07-20 23:08:25,278 INFO L226 Difference]: Without dead ends: 5853 [2020-07-20 23:08:25,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:08:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2020-07-20 23:08:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 5851. [2020-07-20 23:08:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5851 states. [2020-07-20 23:08:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5851 states to 5851 states and 8935 transitions. [2020-07-20 23:08:25,539 INFO L78 Accepts]: Start accepts. Automaton has 5851 states and 8935 transitions. Word has length 328 [2020-07-20 23:08:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:25,539 INFO L479 AbstractCegarLoop]: Abstraction has 5851 states and 8935 transitions. [2020-07-20 23:08:25,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 5851 states and 8935 transitions. [2020-07-20 23:08:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:08:25,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:25,556 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 23:08:25,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:25,770 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1027019292, now seen corresponding path program 1 times [2020-07-20 23:08:25,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:25,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190517729] [2020-07-20 23:08:25,771 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 23:08:26,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:26,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:26,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:26,225 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 23:08:26,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:26,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190517729] [2020-07-20 23:08:26,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:26,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:26,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841101965] [2020-07-20 23:08:26,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:26,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:26,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:26,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:26,228 INFO L87 Difference]: Start difference. First operand 5851 states and 8935 transitions. Second operand 3 states. [2020-07-20 23:08:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:26,630 INFO L93 Difference]: Finished difference Result 16711 states and 25421 transitions. [2020-07-20 23:08:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:26,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 23:08:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:26,671 INFO L225 Difference]: With dead ends: 16711 [2020-07-20 23:08:26,671 INFO L226 Difference]: Without dead ends: 11237 [2020-07-20 23:08:26,686 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 23:08:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11237 states. [2020-07-20 23:08:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11237 to 11235. [2020-07-20 23:08:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11235 states. [2020-07-20 23:08:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11235 states to 11235 states and 17023 transitions. [2020-07-20 23:08:27,178 INFO L78 Accepts]: Start accepts. Automaton has 11235 states and 17023 transitions. Word has length 330 [2020-07-20 23:08:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:27,179 INFO L479 AbstractCegarLoop]: Abstraction has 11235 states and 17023 transitions. [2020-07-20 23:08:27,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11235 states and 17023 transitions. [2020-07-20 23:08:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 23:08:27,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:27,206 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 23:08:27,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:27,420 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1811835351, now seen corresponding path program 1 times [2020-07-20 23:08:27,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:27,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612020628] [2020-07-20 23:08:27,421 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 23:08:27,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:08:27,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:27,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:27,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:27,849 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 23:08:27,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:27,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612020628] [2020-07-20 23:08:27,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:27,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:27,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230874138] [2020-07-20 23:08:27,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:27,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:27,852 INFO L87 Difference]: Start difference. First operand 11235 states and 17023 transitions. Second operand 3 states. [2020-07-20 23:08:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:28,534 INFO L93 Difference]: Finished difference Result 33047 states and 49989 transitions. [2020-07-20 23:08:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:28,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 23:08:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:28,591 INFO L225 Difference]: With dead ends: 33047 [2020-07-20 23:08:28,592 INFO L226 Difference]: Without dead ends: 22153 [2020-07-20 23:08:28,724 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 23:08:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22153 states. [2020-07-20 23:08:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22153 to 11287. [2020-07-20 23:08:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11287 states. [2020-07-20 23:08:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11287 states to 11287 states and 17087 transitions. [2020-07-20 23:08:29,273 INFO L78 Accepts]: Start accepts. Automaton has 11287 states and 17087 transitions. Word has length 330 [2020-07-20 23:08:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:29,273 INFO L479 AbstractCegarLoop]: Abstraction has 11287 states and 17087 transitions. [2020-07-20 23:08:29,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 11287 states and 17087 transitions. [2020-07-20 23:08:29,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 23:08:29,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:29,300 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 23:08:29,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:29,513 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 543201427, now seen corresponding path program 1 times [2020-07-20 23:08:29,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:29,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962421753] [2020-07-20 23:08:29,514 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 23:08:29,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:29,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:29,839 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 23:08:29,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:29,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962421753] [2020-07-20 23:08:29,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:29,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:29,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723498791] [2020-07-20 23:08:29,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:29,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:29,842 INFO L87 Difference]: Start difference. First operand 11287 states and 17087 transitions. Second operand 3 states. [2020-07-20 23:08:30,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:30,335 INFO L93 Difference]: Finished difference Result 33147 states and 50121 transitions. [2020-07-20 23:08:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:30,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-20 23:08:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:30,393 INFO L225 Difference]: With dead ends: 33147 [2020-07-20 23:08:30,394 INFO L226 Difference]: Without dead ends: 22181 [2020-07-20 23:08:30,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22181 states. [2020-07-20 23:08:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22181 to 11351. [2020-07-20 23:08:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11351 states. [2020-07-20 23:08:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11351 states to 11351 states and 17167 transitions. [2020-07-20 23:08:31,066 INFO L78 Accepts]: Start accepts. Automaton has 11351 states and 17167 transitions. Word has length 331 [2020-07-20 23:08:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:31,067 INFO L479 AbstractCegarLoop]: Abstraction has 11351 states and 17167 transitions. [2020-07-20 23:08:31,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:31,067 INFO L276 IsEmpty]: Start isEmpty. Operand 11351 states and 17167 transitions. [2020-07-20 23:08:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 23:08:31,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:31,104 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 23:08:31,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:31,318 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:31,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:31,319 INFO L82 PathProgramCache]: Analyzing trace with hash 799365023, now seen corresponding path program 1 times [2020-07-20 23:08:31,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:31,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125582286] [2020-07-20 23:08:31,320 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 23:08:32,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:32,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:08:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:08:32,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:32,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125582286] [2020-07-20 23:08:32,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:32,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:32,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020068468] [2020-07-20 23:08:32,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:32,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:32,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:32,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:32,289 INFO L87 Difference]: Start difference. First operand 11351 states and 17167 transitions. Second operand 4 states. [2020-07-20 23:08:33,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:33,078 INFO L93 Difference]: Finished difference Result 32779 states and 49455 transitions. [2020-07-20 23:08:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:08:33,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 23:08:33,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:33,116 INFO L225 Difference]: With dead ends: 32779 [2020-07-20 23:08:33,116 INFO L226 Difference]: Without dead ends: 21857 [2020-07-20 23:08:33,142 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 23:08:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21857 states. [2020-07-20 23:08:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21857 to 21855. [2020-07-20 23:08:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21855 states. [2020-07-20 23:08:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21855 states to 21855 states and 32781 transitions. [2020-07-20 23:08:33,939 INFO L78 Accepts]: Start accepts. Automaton has 21855 states and 32781 transitions. Word has length 332 [2020-07-20 23:08:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:33,939 INFO L479 AbstractCegarLoop]: Abstraction has 21855 states and 32781 transitions. [2020-07-20 23:08:33,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 21855 states and 32781 transitions. [2020-07-20 23:08:33,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:08:33,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:33,969 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 23:08:34,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:34,170 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:34,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1207001023, now seen corresponding path program 1 times [2020-07-20 23:08:34,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:34,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176833155] [2020-07-20 23:08:34,172 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 23:08:34,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:08:34,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:08:34,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:34,524 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 23:08:34,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:34,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176833155] [2020-07-20 23:08:34,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:34,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:34,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222398083] [2020-07-20 23:08:34,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:34,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:34,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:34,527 INFO L87 Difference]: Start difference. First operand 21855 states and 32781 transitions. Second operand 4 states. [2020-07-20 23:08:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:36,663 INFO L93 Difference]: Finished difference Result 63635 states and 95105 transitions. [2020-07-20 23:08:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:08:36,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 23:08:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:36,720 INFO L225 Difference]: With dead ends: 63635 [2020-07-20 23:08:36,720 INFO L226 Difference]: Without dead ends: 43537 [2020-07-20 23:08:36,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 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 23:08:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43537 states. [2020-07-20 23:08:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43537 to 23759. [2020-07-20 23:08:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23759 states. [2020-07-20 23:08:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23759 states to 23759 states and 35919 transitions. [2020-07-20 23:08:37,756 INFO L78 Accepts]: Start accepts. Automaton has 23759 states and 35919 transitions. Word has length 334 [2020-07-20 23:08:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:37,757 INFO L479 AbstractCegarLoop]: Abstraction has 23759 states and 35919 transitions. [2020-07-20 23:08:37,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 23759 states and 35919 transitions. [2020-07-20 23:08:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 23:08:37,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:37,785 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 23:08:37,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:37,987 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:37,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash 895943326, now seen corresponding path program 1 times [2020-07-20 23:08:37,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:37,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935385338] [2020-07-20 23:08:37,989 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 23:08:38,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:38,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:08:38,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:39,116 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 23:08:39,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:39,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935385338] [2020-07-20 23:08:39,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:39,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:39,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636881316] [2020-07-20 23:08:39,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:39,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:39,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:39,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:39,119 INFO L87 Difference]: Start difference. First operand 23759 states and 35919 transitions. Second operand 4 states. [2020-07-20 23:08:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:40,669 INFO L93 Difference]: Finished difference Result 69369 states and 104703 transitions. [2020-07-20 23:08:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:08:40,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 23:08:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:40,721 INFO L225 Difference]: With dead ends: 69369 [2020-07-20 23:08:40,721 INFO L226 Difference]: Without dead ends: 46075 [2020-07-20 23:08:40,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 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 23:08:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46075 states. [2020-07-20 23:08:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46075 to 45977. [2020-07-20 23:08:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45977 states. [2020-07-20 23:08:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45977 states to 45977 states and 68939 transitions. [2020-07-20 23:08:42,606 INFO L78 Accepts]: Start accepts. Automaton has 45977 states and 68939 transitions. Word has length 334 [2020-07-20 23:08:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:42,607 INFO L479 AbstractCegarLoop]: Abstraction has 45977 states and 68939 transitions. [2020-07-20 23:08:42,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45977 states and 68939 transitions. [2020-07-20 23:08:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 23:08:42,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:42,654 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 23:08:42,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:42,861 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:42,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:42,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1279817351, now seen corresponding path program 1 times [2020-07-20 23:08:42,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:42,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649640319] [2020-07-20 23:08:42,863 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 23:08:43,099 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:08:43,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:08:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:43,184 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 23:08:43,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:43,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649640319] [2020-07-20 23:08:43,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:43,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:08:43,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542946912] [2020-07-20 23:08:43,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:08:43,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:43,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:08:43,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:08:43,187 INFO L87 Difference]: Start difference. First operand 45977 states and 68939 transitions. Second operand 4 states. [2020-07-20 23:08:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:46,681 INFO L93 Difference]: Finished difference Result 122833 states and 182673 transitions. [2020-07-20 23:08:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:08:46,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 23:08:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:46,799 INFO L225 Difference]: With dead ends: 122833 [2020-07-20 23:08:46,800 INFO L226 Difference]: Without dead ends: 84431 [2020-07-20 23:08:46,859 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 23:08:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84431 states. [2020-07-20 23:08:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84431 to 51325. [2020-07-20 23:08:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51325 states. [2020-07-20 23:08:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51325 states to 51325 states and 77963 transitions. [2020-07-20 23:08:49,279 INFO L78 Accepts]: Start accepts. Automaton has 51325 states and 77963 transitions. Word has length 335 [2020-07-20 23:08:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:49,279 INFO L479 AbstractCegarLoop]: Abstraction has 51325 states and 77963 transitions. [2020-07-20 23:08:49,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:08:49,280 INFO L276 IsEmpty]: Start isEmpty. Operand 51325 states and 77963 transitions. [2020-07-20 23:08:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 23:08:49,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:49,328 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 23:08:49,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:49,535 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1314070376, now seen corresponding path program 1 times [2020-07-20 23:08:49,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:49,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589904112] [2020-07-20 23:08:49,537 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 23:08:49,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:08:49,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:49,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:49,849 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 23:08:49,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:49,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589904112] [2020-07-20 23:08:49,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:49,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:49,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914114689] [2020-07-20 23:08:49,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:49,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:49,852 INFO L87 Difference]: Start difference. First operand 51325 states and 77963 transitions. Second operand 3 states. [2020-07-20 23:08:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:08:53,875 INFO L93 Difference]: Finished difference Result 127953 states and 190021 transitions. [2020-07-20 23:08:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:08:53,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-20 23:08:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:53,984 INFO L225 Difference]: With dead ends: 127953 [2020-07-20 23:08:53,984 INFO L226 Difference]: Without dead ends: 89671 [2020-07-20 23:08:54,025 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 23:08:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89671 states. [2020-07-20 23:08:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89671 to 52165. [2020-07-20 23:08:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52165 states. [2020-07-20 23:08:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52165 states to 52165 states and 79035 transitions. [2020-07-20 23:08:56,315 INFO L78 Accepts]: Start accepts. Automaton has 52165 states and 79035 transitions. Word has length 337 [2020-07-20 23:08:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:08:56,316 INFO L479 AbstractCegarLoop]: Abstraction has 52165 states and 79035 transitions. [2020-07-20 23:08:56,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:08:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 52165 states and 79035 transitions. [2020-07-20 23:08:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:08:56,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:08:56,360 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 23:08:56,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:08:56,561 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:08:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:08:56,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1495972204, now seen corresponding path program 1 times [2020-07-20 23:08:56,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:08:56,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183860338] [2020-07-20 23:08:56,563 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 23:08:56,831 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:08:56,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:08:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:08:56,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:08:56,893 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 23:08:56,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:08:56,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183860338] [2020-07-20 23:08:56,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:08:56,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:08:56,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291573582] [2020-07-20 23:08:56,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:08:56,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:08:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:08:56,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:08:56,895 INFO L87 Difference]: Start difference. First operand 52165 states and 79035 transitions. Second operand 3 states. [2020-07-20 23:09:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:01,654 INFO L93 Difference]: Finished difference Result 129617 states and 192205 transitions. [2020-07-20 23:09:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:01,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 23:09:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:01,770 INFO L225 Difference]: With dead ends: 129617 [2020-07-20 23:09:01,770 INFO L226 Difference]: Without dead ends: 90975 [2020-07-20 23:09:01,809 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 23:09:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90975 states. [2020-07-20 23:09:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90975 to 53293. [2020-07-20 23:09:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53293 states. [2020-07-20 23:09:04,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53293 states to 53293 states and 80451 transitions. [2020-07-20 23:09:04,443 INFO L78 Accepts]: Start accepts. Automaton has 53293 states and 80451 transitions. Word has length 338 [2020-07-20 23:09:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:04,444 INFO L479 AbstractCegarLoop]: Abstraction has 53293 states and 80451 transitions. [2020-07-20 23:09:04,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 53293 states and 80451 transitions. [2020-07-20 23:09:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 23:09:04,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:04,487 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 23:09:04,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:04,688 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:04,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1031089713, now seen corresponding path program 1 times [2020-07-20 23:09:04,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:04,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718963660] [2020-07-20 23:09:04,690 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 23:09:04,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:09:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:09:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 23:09:05,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:05,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718963660] [2020-07-20 23:09:05,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:05,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:09:05,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965795156] [2020-07-20 23:09:05,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:09:05,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:05,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:09:05,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:09:05,053 INFO L87 Difference]: Start difference. First operand 53293 states and 80451 transitions. Second operand 3 states. [2020-07-20 23:09:09,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:09,010 INFO L93 Difference]: Finished difference Result 146959 states and 219877 transitions. [2020-07-20 23:09:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:09:09,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 23:09:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:09,135 INFO L225 Difference]: With dead ends: 146959 [2020-07-20 23:09:09,136 INFO L226 Difference]: Without dead ends: 102021 [2020-07-20 23:09:09,185 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 23:09:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102021 states. [2020-07-20 23:09:15,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102021 to 101443. [2020-07-20 23:09:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101443 states. [2020-07-20 23:09:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101443 states to 101443 states and 151881 transitions. [2020-07-20 23:09:15,358 INFO L78 Accepts]: Start accepts. Automaton has 101443 states and 151881 transitions. Word has length 338 [2020-07-20 23:09:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:15,359 INFO L479 AbstractCegarLoop]: Abstraction has 101443 states and 151881 transitions. [2020-07-20 23:09:15,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:09:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 101443 states and 151881 transitions. [2020-07-20 23:09:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 23:09:15,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:15,443 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 23:09:15,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:15,649 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:15,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1025042045, now seen corresponding path program 1 times [2020-07-20 23:09:15,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:15,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622361061] [2020-07-20 23:09:15,651 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 23:09:15,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:15,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:09:15,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:15,945 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 23:09:15,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:15,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622361061] [2020-07-20 23:09:15,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:15,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:09:15,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248339268] [2020-07-20 23:09:15,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:09:15,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:15,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:09:15,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:09:15,947 INFO L87 Difference]: Start difference. First operand 101443 states and 151881 transitions. Second operand 4 states. [2020-07-20 23:09:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:25,719 INFO L93 Difference]: Finished difference Result 274983 states and 408075 transitions. [2020-07-20 23:09:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:09:25,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 23:09:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:26,002 INFO L225 Difference]: With dead ends: 274983 [2020-07-20 23:09:26,002 INFO L226 Difference]: Without dead ends: 198933 [2020-07-20 23:09:26,071 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 23:09:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198933 states. [2020-07-20 23:09:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198933 to 125107. [2020-07-20 23:09:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125107 states. [2020-07-20 23:09:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125107 states to 125107 states and 190473 transitions. [2020-07-20 23:09:32,271 INFO L78 Accepts]: Start accepts. Automaton has 125107 states and 190473 transitions. Word has length 340 [2020-07-20 23:09:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:32,271 INFO L479 AbstractCegarLoop]: Abstraction has 125107 states and 190473 transitions. [2020-07-20 23:09:32,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:09:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 125107 states and 190473 transitions. [2020-07-20 23:09:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 23:09:32,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:32,388 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 23:09:32,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:32,589 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1143847227, now seen corresponding path program 1 times [2020-07-20 23:09:32,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:32,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028837751] [2020-07-20 23:09:32,591 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 23:09:32,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:32,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:32,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 23:09:32,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:32,910 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 23:09:32,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:32,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028837751] [2020-07-20 23:09:32,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:32,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:09:32,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14605987] [2020-07-20 23:09:32,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:09:32,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:32,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:09:32,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:09:32,913 INFO L87 Difference]: Start difference. First operand 125107 states and 190473 transitions. Second operand 4 states. [2020-07-20 23:09:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:09:44,545 INFO L93 Difference]: Finished difference Result 289911 states and 431561 transitions. [2020-07-20 23:09:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:09:44,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 23:09:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:09:44,802 INFO L225 Difference]: With dead ends: 289911 [2020-07-20 23:09:44,803 INFO L226 Difference]: Without dead ends: 209989 [2020-07-20 23:09:44,878 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 23:09:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209989 states. [2020-07-20 23:09:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209989 to 140115. [2020-07-20 23:09:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140115 states. [2020-07-20 23:09:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140115 states to 140115 states and 214887 transitions. [2020-07-20 23:09:52,053 INFO L78 Accepts]: Start accepts. Automaton has 140115 states and 214887 transitions. Word has length 340 [2020-07-20 23:09:52,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:09:52,054 INFO L479 AbstractCegarLoop]: Abstraction has 140115 states and 214887 transitions. [2020-07-20 23:09:52,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:09:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 140115 states and 214887 transitions. [2020-07-20 23:09:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 23:09:52,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:09:52,205 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 23:09:52,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:09:52,406 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:09:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:09:52,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1862727472, now seen corresponding path program 1 times [2020-07-20 23:09:52,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:09:52,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136140411] [2020-07-20 23:09:52,408 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 23:09:52,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:09:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:09:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:09:52,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:09:52,776 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 23:09:52,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:09:52,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136140411] [2020-07-20 23:09:52,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:09:52,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 23:09:52,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120324100] [2020-07-20 23:09:52,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 23:09:52,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:09:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 23:09:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 23:09:52,778 INFO L87 Difference]: Start difference. First operand 140115 states and 214887 transitions. Second operand 9 states. [2020-07-20 23:10:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:10:31,971 INFO L93 Difference]: Finished difference Result 553805 states and 841012 transitions. [2020-07-20 23:10:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 23:10:31,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 340 [2020-07-20 23:10:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:10:32,711 INFO L225 Difference]: With dead ends: 553805 [2020-07-20 23:10:32,711 INFO L226 Difference]: Without dead ends: 536011 [2020-07-20 23:10:32,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 23:10:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536011 states. [2020-07-20 23:10:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536011 to 246099. [2020-07-20 23:10:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246099 states. [2020-07-20 23:10:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246099 states to 246099 states and 374503 transitions. [2020-07-20 23:10:58,354 INFO L78 Accepts]: Start accepts. Automaton has 246099 states and 374503 transitions. Word has length 340 [2020-07-20 23:10:58,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:10:58,355 INFO L479 AbstractCegarLoop]: Abstraction has 246099 states and 374503 transitions. [2020-07-20 23:10:58,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 23:10:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 246099 states and 374503 transitions. [2020-07-20 23:10:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 23:10:58,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:10:58,525 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 23:10:58,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:10:58,726 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:10:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:10:58,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1634164521, now seen corresponding path program 1 times [2020-07-20 23:10:58,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:10:58,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829438502] [2020-07-20 23:10:58,728 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 23:10:58,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:10:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:10:58,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:10:58,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:10:59,117 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 23:10:59,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:10:59,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829438502] [2020-07-20 23:10:59,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:10:59,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:10:59,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540595057] [2020-07-20 23:10:59,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:10:59,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:10:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:10:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:10:59,120 INFO L87 Difference]: Start difference. First operand 246099 states and 374503 transitions. Second operand 4 states. [2020-07-20 23:11:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:11:21,079 INFO L93 Difference]: Finished difference Result 523164 states and 797743 transitions. [2020-07-20 23:11:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 23:11:21,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 23:11:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:11:21,447 INFO L225 Difference]: With dead ends: 523164 [2020-07-20 23:11:21,447 INFO L226 Difference]: Without dead ends: 277108 [2020-07-20 23:11:21,634 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 23:11:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277108 states. [2020-07-20 23:11:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277108 to 252672. [2020-07-20 23:11:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252672 states. [2020-07-20 23:11:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252672 states to 252672 states and 385589 transitions. [2020-07-20 23:11:37,979 INFO L78 Accepts]: Start accepts. Automaton has 252672 states and 385589 transitions. Word has length 340 [2020-07-20 23:11:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:11:37,979 INFO L479 AbstractCegarLoop]: Abstraction has 252672 states and 385589 transitions. [2020-07-20 23:11:37,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 23:11:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 252672 states and 385589 transitions. [2020-07-20 23:11:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 23:11:38,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:11:38,185 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 (20)] Forcibly destroying the process [2020-07-20 23:11:42,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:11:42,245 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:11:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:11:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash 67543972, now seen corresponding path program 1 times [2020-07-20 23:11:42,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:11:42,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912182931] [2020-07-20 23:11:42,246 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 23:11:42,524 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:11:42,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:11:42,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:11:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:11:42,617 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 23:11:42,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:11:42,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912182931] [2020-07-20 23:11:42,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:11:42,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:11:42,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187751876] [2020-07-20 23:11:42,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:11:42,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:11:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:11:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:11:42,619 INFO L87 Difference]: Start difference. First operand 252672 states and 385589 transitions. Second operand 3 states. [2020-07-20 23:12:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:12:17,564 INFO L93 Difference]: Finished difference Result 704246 states and 1065679 transitions. [2020-07-20 23:12:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:12:17,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 23:12:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:12:18,229 INFO L225 Difference]: With dead ends: 704246 [2020-07-20 23:12:18,230 INFO L226 Difference]: Without dead ends: 481316 [2020-07-20 23:12:18,423 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 23:12:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481316 states. [2020-07-20 23:12:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481316 to 481314. [2020-07-20 23:12:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481314 states. [2020-07-20 23:12:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481314 states to 481314 states and 726715 transitions. [2020-07-20 23:12:56,646 INFO L78 Accepts]: Start accepts. Automaton has 481314 states and 726715 transitions. Word has length 342 [2020-07-20 23:12:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:12:56,646 INFO L479 AbstractCegarLoop]: Abstraction has 481314 states and 726715 transitions. [2020-07-20 23:12:56,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:12:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 481314 states and 726715 transitions. [2020-07-20 23:12:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 23:12:58,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:12:58,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:12:58,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:12:58,527 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:12:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:12:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash -451489879, now seen corresponding path program 1 times [2020-07-20 23:12:58,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:12:58,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019836491] [2020-07-20 23:12:58,529 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 23:12:58,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 23:12:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:12:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:12:58,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:12:58,820 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 23:12:58,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:12:58,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019836491] [2020-07-20 23:12:58,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:12:58,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:12:58,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693270871] [2020-07-20 23:12:58,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:12:58,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:12:58,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:12:58,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:12:58,822 INFO L87 Difference]: Start difference. First operand 481314 states and 726715 transitions. Second operand 3 states. [2020-07-20 23:14:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:14:14,212 INFO L93 Difference]: Finished difference Result 1442931 states and 2178718 transitions. [2020-07-20 23:14:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:14:14,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 23:14:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:14:15,719 INFO L225 Difference]: With dead ends: 1442931 [2020-07-20 23:14:15,719 INFO L226 Difference]: Without dead ends: 961634 [2020-07-20 23:14:16,164 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 23:14:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961634 states. [2020-07-20 23:15:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961634 to 481293. [2020-07-20 23:15:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481293 states. [2020-07-20 23:15:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481293 states to 481293 states and 726684 transitions. [2020-07-20 23:15:07,945 INFO L78 Accepts]: Start accepts. Automaton has 481293 states and 726684 transitions. Word has length 342 [2020-07-20 23:15:07,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:15:07,945 INFO L479 AbstractCegarLoop]: Abstraction has 481293 states and 726684 transitions. [2020-07-20 23:15:07,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:15:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 481293 states and 726684 transitions. [2020-07-20 23:15:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-20 23:15:08,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:15:08,408 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] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (22)] Forcibly destroying the process [2020-07-20 23:15:09,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:15:09,475 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:15:09,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:15:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2045751011, now seen corresponding path program 1 times [2020-07-20 23:15:09,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:15:09,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503742264] [2020-07-20 23:15:09,477 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 23:15:09,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:15:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:15:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:15:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:15:09,826 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 23:15:09,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:15:09,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503742264] [2020-07-20 23:15:09,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:15:09,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:15:09,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944409669] [2020-07-20 23:15:09,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:15:09,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:15:09,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:15:09,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:15:09,827 INFO L87 Difference]: Start difference. First operand 481293 states and 726684 transitions. Second operand 3 states. [2020-07-20 23:16:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:16:29,352 INFO L93 Difference]: Finished difference Result 1418203 states and 2137526 transitions. [2020-07-20 23:16:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:16:29,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-20 23:16:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:16:31,207 INFO L225 Difference]: With dead ends: 1418203 [2020-07-20 23:16:31,208 INFO L226 Difference]: Without dead ends: 937632 [2020-07-20 23:16:31,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:16:32,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937632 states. [2020-07-20 23:17:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937632 to 481303. [2020-07-20 23:17:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481303 states. [2020-07-20 23:17:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481303 states to 481303 states and 726697 transitions. [2020-07-20 23:17:24,017 INFO L78 Accepts]: Start accepts. Automaton has 481303 states and 726697 transitions. Word has length 343 [2020-07-20 23:17:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:17:24,017 INFO L479 AbstractCegarLoop]: Abstraction has 481303 states and 726697 transitions. [2020-07-20 23:17:24,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:17:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 481303 states and 726697 transitions. [2020-07-20 23:17:25,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 23:17:25,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:17:25,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:17:25,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:17:25,736 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:17:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:17:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1508533460, now seen corresponding path program 1 times [2020-07-20 23:17:25,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:17:25,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656376422] [2020-07-20 23:17:25,738 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 23:17:26,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:17:26,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:17:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 23:17:26,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:17:26,086 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 23:17:26,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:17:26,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656376422] [2020-07-20 23:17:26,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:17:26,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 23:17:26,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312307325] [2020-07-20 23:17:26,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 23:17:26,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:17:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 23:17:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 23:17:26,088 INFO L87 Difference]: Start difference. First operand 481303 states and 726697 transitions. Second operand 3 states. [2020-07-20 23:18:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:18:24,955 INFO L93 Difference]: Finished difference Result 953459 states and 1435795 transitions. [2020-07-20 23:18:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 23:18:24,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2020-07-20 23:18:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:18:25,920 INFO L225 Difference]: With dead ends: 953459 [2020-07-20 23:18:25,920 INFO L226 Difference]: Without dead ends: 659921 [2020-07-20 23:18:26,231 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 23:18:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659921 states. [2020-07-20 23:19:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659921 to 568079. [2020-07-20 23:19:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568079 states. [2020-07-20 23:19:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568079 states to 568079 states and 865921 transitions. [2020-07-20 23:19:25,776 INFO L78 Accepts]: Start accepts. Automaton has 568079 states and 865921 transitions. Word has length 344 [2020-07-20 23:19:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:19:25,777 INFO L479 AbstractCegarLoop]: Abstraction has 568079 states and 865921 transitions. [2020-07-20 23:19:25,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:19:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 568079 states and 865921 transitions. [2020-07-20 23:19:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 23:19:26,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:19:26,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:19:26,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:19:26,490 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:19:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:19:26,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1692840863, now seen corresponding path program 1 times [2020-07-20 23:19:26,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:19:26,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688716002] [2020-07-20 23:19:26,492 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 23:19:26,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 23:19:26,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:19:26,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 23:19:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:19:26,886 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 23:19:26,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:19:26,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688716002] [2020-07-20 23:19:26,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:19:26,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 23:19:26,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719913477] [2020-07-20 23:19:26,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 23:19:26,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:19:26,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 23:19:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 23:19:26,889 INFO L87 Difference]: Start difference. First operand 568079 states and 865921 transitions. Second operand 4 states.