/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:35:51,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:35:51,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:35:51,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:35:51,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:35:51,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:35:51,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:35:51,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:35:51,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:35:51,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:35:51,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:35:51,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:35:51,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:35:51,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:35:51,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:35:51,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:35:51,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:35:51,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:35:51,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:35:51,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:35:51,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:35:51,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:35:51,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:35:51,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:35:51,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:35:51,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:35:51,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:35:51,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:35:51,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:35:51,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:35:51,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:35:51,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:35:51,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:35:51,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:35:51,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:35:51,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:35:51,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:35:51,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:35:51,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:35:51,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:35:51,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:35:51,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:35:51,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:35:51,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:35:52,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:35:52,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:35:52,000 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:35:52,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:35:52,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:35:52,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:35:52,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:35:52,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:35:52,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:35:52,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:35:52,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:35:52,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:35:52,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:35:52,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:35:52,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:35:52,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:35:52,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:35:52,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:35:52,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:35:52,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:35:52,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:35:52,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:35:52,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:35:52,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:35:52,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:52,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:35:52,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:35:52,006 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 -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:35:52,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:35:52,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:35:52,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:35:52,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:35:52,319 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:35:52,320 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:35:52,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a251cc22/3be10bcc969342e29d96411c0d4d0c76/FLAG7525278d4 [2020-07-21 17:35:53,063 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:35:53,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:35:53,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a251cc22/3be10bcc969342e29d96411c0d4d0c76/FLAG7525278d4 [2020-07-21 17:35:53,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a251cc22/3be10bcc969342e29d96411c0d4d0c76 [2020-07-21 17:35:53,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:35:53,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:35:53,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:35:53,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:35:53,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:35:53,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:35:53" (1/1) ... [2020-07-21 17:35:53,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2efca680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:53, skipping insertion in model container [2020-07-21 17:35:53,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:35:53" (1/1) ... [2020-07-21 17:35:53,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:35:53,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:35:55,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:35:55,109 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:35:56,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:35:56,562 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:35:56,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56 WrapperNode [2020-07-21 17:35:56,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:35:56,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:35:56,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:35:56,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:35:56,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... [2020-07-21 17:35:56,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... [2020-07-21 17:35:56,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... [2020-07-21 17:35:56,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... [2020-07-21 17:35:56,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... [2020-07-21 17:35:56,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... [2020-07-21 17:35:56,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... [2020-07-21 17:35:56,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:35:56,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:35:56,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:35:56,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:35:56,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:35:56,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:35:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:35:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:35:56,864 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:35:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:35:56,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:35:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 17:35:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:35:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:35:56,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:35:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:35:56,867 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:35:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:35:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:35:56,868 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:35:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:35:56,869 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:35:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 17:35:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:35:56,870 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:35:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:35:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:35:56,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:36:01,304 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:36:01,304 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:36:01,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:01 BoogieIcfgContainer [2020-07-21 17:36:01,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:36:01,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:36:01,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:36:01,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:36:01,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:35:53" (1/3) ... [2020-07-21 17:36:01,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481f7119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:36:01, skipping insertion in model container [2020-07-21 17:36:01,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:35:56" (2/3) ... [2020-07-21 17:36:01,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481f7119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:36:01, skipping insertion in model container [2020-07-21 17:36:01,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:36:01" (3/3) ... [2020-07-21 17:36:01,325 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:36:01,335 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:36:01,345 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:36:01,359 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:36:01,387 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:36:01,387 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:36:01,387 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:36:01,388 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:36:01,388 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:36:01,388 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:36:01,388 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:36:01,388 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:36:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-21 17:36:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:36:01,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:01,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:01,484 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-21 17:36:01,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:01,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766363830] [2020-07-21 17:36:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:02,017 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:36:02,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:36:02,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:02,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:02,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766363830] [2020-07-21 17:36:02,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:02,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:02,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240096635] [2020-07-21 17:36:02,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:02,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:02,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:02,485 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 3 states. [2020-07-21 17:36:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:02,811 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-21 17:36:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:02,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 17:36:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:02,847 INFO L225 Difference]: With dead ends: 2488 [2020-07-21 17:36:02,847 INFO L226 Difference]: Without dead ends: 2186 [2020-07-21 17:36:02,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-21 17:36:03,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-21 17:36:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-21 17:36:03,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-21 17:36:03,022 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-21 17:36:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:03,024 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-21 17:36:03,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-21 17:36:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:36:03,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:03,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:03,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:03,254 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:03,255 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-21 17:36:03,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:03,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050862378] [2020-07-21 17:36:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:03,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:03,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:03,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:36:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:04,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:04,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050862378] [2020-07-21 17:36:04,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:04,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:36:04,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765005055] [2020-07-21 17:36:04,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:36:04,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:04,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:36:04,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:36:04,295 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 4 states. [2020-07-21 17:36:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:04,622 INFO L93 Difference]: Finished difference Result 6477 states and 10566 transitions. [2020-07-21 17:36:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:36:04,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 17:36:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:04,647 INFO L225 Difference]: With dead ends: 6477 [2020-07-21 17:36:04,648 INFO L226 Difference]: Without dead ends: 4308 [2020-07-21 17:36:04,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:36:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2020-07-21 17:36:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 4306. [2020-07-21 17:36:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4306 states. [2020-07-21 17:36:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 6998 transitions. [2020-07-21 17:36:04,836 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 6998 transitions. Word has length 496 [2020-07-21 17:36:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:04,837 INFO L479 AbstractCegarLoop]: Abstraction has 4306 states and 6998 transitions. [2020-07-21 17:36:04,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:36:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 6998 transitions. [2020-07-21 17:36:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 17:36:04,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:04,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:05,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:05,063 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:05,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:05,064 INFO L82 PathProgramCache]: Analyzing trace with hash 598630969, now seen corresponding path program 1 times [2020-07-21 17:36:05,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:05,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023079049] [2020-07-21 17:36:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:05,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:05,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:05,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:05,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023079049] [2020-07-21 17:36:05,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:05,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:05,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909167041] [2020-07-21 17:36:05,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:05,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:05,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:05,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:05,915 INFO L87 Difference]: Start difference. First operand 4306 states and 6998 transitions. Second operand 3 states. [2020-07-21 17:36:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:06,280 INFO L93 Difference]: Finished difference Result 12571 states and 20378 transitions. [2020-07-21 17:36:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:06,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 17:36:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:06,323 INFO L225 Difference]: With dead ends: 12571 [2020-07-21 17:36:06,324 INFO L226 Difference]: Without dead ends: 8494 [2020-07-21 17:36:06,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2020-07-21 17:36:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 8492. [2020-07-21 17:36:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8492 states. [2020-07-21 17:36:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 13752 transitions. [2020-07-21 17:36:06,709 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 13752 transitions. Word has length 498 [2020-07-21 17:36:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:06,710 INFO L479 AbstractCegarLoop]: Abstraction has 8492 states and 13752 transitions. [2020-07-21 17:36:06,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:06,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 13752 transitions. [2020-07-21 17:36:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 17:36:06,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:06,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:06,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:06,949 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:06,949 INFO L82 PathProgramCache]: Analyzing trace with hash 74932662, now seen corresponding path program 1 times [2020-07-21 17:36:06,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:06,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880702145] [2020-07-21 17:36:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:07,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:07,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:07,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:07,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:07,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880702145] [2020-07-21 17:36:07,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:07,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:07,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743437921] [2020-07-21 17:36:07,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:07,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:07,835 INFO L87 Difference]: Start difference. First operand 8492 states and 13752 transitions. Second operand 3 states. [2020-07-21 17:36:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:08,209 INFO L93 Difference]: Finished difference Result 25220 states and 40793 transitions. [2020-07-21 17:36:08,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:08,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 17:36:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:08,277 INFO L225 Difference]: With dead ends: 25220 [2020-07-21 17:36:08,277 INFO L226 Difference]: Without dead ends: 16759 [2020-07-21 17:36:08,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16759 states. [2020-07-21 17:36:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16759 to 8518. [2020-07-21 17:36:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8518 states. [2020-07-21 17:36:08,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8518 states to 8518 states and 13790 transitions. [2020-07-21 17:36:08,679 INFO L78 Accepts]: Start accepts. Automaton has 8518 states and 13790 transitions. Word has length 499 [2020-07-21 17:36:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:08,680 INFO L479 AbstractCegarLoop]: Abstraction has 8518 states and 13790 transitions. [2020-07-21 17:36:08,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 8518 states and 13790 transitions. [2020-07-21 17:36:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 17:36:08,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:08,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:08,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:08,918 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:08,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1851088404, now seen corresponding path program 1 times [2020-07-21 17:36:08,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:08,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411493453] [2020-07-21 17:36:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:10,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:10,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:10,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411493453] [2020-07-21 17:36:10,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:10,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:10,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491498288] [2020-07-21 17:36:10,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:10,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:10,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:10,295 INFO L87 Difference]: Start difference. First operand 8518 states and 13790 transitions. Second operand 3 states. [2020-07-21 17:36:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:10,829 INFO L93 Difference]: Finished difference Result 24970 states and 40350 transitions. [2020-07-21 17:36:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:10,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 17:36:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:10,931 INFO L225 Difference]: With dead ends: 24970 [2020-07-21 17:36:10,932 INFO L226 Difference]: Without dead ends: 16764 [2020-07-21 17:36:10,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16764 states. [2020-07-21 17:36:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16764 to 16762. [2020-07-21 17:36:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16762 states. [2020-07-21 17:36:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16762 states to 16762 states and 27029 transitions. [2020-07-21 17:36:11,477 INFO L78 Accepts]: Start accepts. Automaton has 16762 states and 27029 transitions. Word has length 500 [2020-07-21 17:36:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:11,478 INFO L479 AbstractCegarLoop]: Abstraction has 16762 states and 27029 transitions. [2020-07-21 17:36:11,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16762 states and 27029 transitions. [2020-07-21 17:36:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 17:36:11,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:11,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:11,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:11,732 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash 444801881, now seen corresponding path program 1 times [2020-07-21 17:36:11,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:11,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012217715] [2020-07-21 17:36:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:12,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:36:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:12,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:12,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012217715] [2020-07-21 17:36:12,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:12,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:12,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157284488] [2020-07-21 17:36:12,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:12,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:12,262 INFO L87 Difference]: Start difference. First operand 16762 states and 27029 transitions. Second operand 3 states. [2020-07-21 17:36:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:12,903 INFO L93 Difference]: Finished difference Result 50150 states and 80855 transitions. [2020-07-21 17:36:12,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:12,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 17:36:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:12,968 INFO L225 Difference]: With dead ends: 50150 [2020-07-21 17:36:12,968 INFO L226 Difference]: Without dead ends: 33452 [2020-07-21 17:36:13,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33452 states. [2020-07-21 17:36:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33452 to 16838. [2020-07-21 17:36:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16838 states. [2020-07-21 17:36:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16838 states to 16838 states and 27135 transitions. [2020-07-21 17:36:13,942 INFO L78 Accepts]: Start accepts. Automaton has 16838 states and 27135 transitions. Word has length 500 [2020-07-21 17:36:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:13,943 INFO L479 AbstractCegarLoop]: Abstraction has 16838 states and 27135 transitions. [2020-07-21 17:36:13,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 16838 states and 27135 transitions. [2020-07-21 17:36:13,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 17:36:13,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:13,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:14,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:14,186 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash 397975741, now seen corresponding path program 1 times [2020-07-21 17:36:14,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:14,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251884382] [2020-07-21 17:36:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:14,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:14,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:14,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:14,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:14,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251884382] [2020-07-21 17:36:14,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:14,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:14,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218187539] [2020-07-21 17:36:14,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:14,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:14,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:14,835 INFO L87 Difference]: Start difference. First operand 16838 states and 27135 transitions. Second operand 3 states. [2020-07-21 17:36:15,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:15,588 INFO L93 Difference]: Finished difference Result 50306 states and 81071 transitions. [2020-07-21 17:36:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:15,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 17:36:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:15,637 INFO L225 Difference]: With dead ends: 50306 [2020-07-21 17:36:15,637 INFO L226 Difference]: Without dead ends: 33544 [2020-07-21 17:36:15,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33544 states. [2020-07-21 17:36:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33544 to 16930. [2020-07-21 17:36:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16930 states. [2020-07-21 17:36:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16930 states to 16930 states and 27261 transitions. [2020-07-21 17:36:16,251 INFO L78 Accepts]: Start accepts. Automaton has 16930 states and 27261 transitions. Word has length 501 [2020-07-21 17:36:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:16,251 INFO L479 AbstractCegarLoop]: Abstraction has 16930 states and 27261 transitions. [2020-07-21 17:36:16,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 16930 states and 27261 transitions. [2020-07-21 17:36:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 17:36:16,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:16,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:16,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:16,473 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash 815858906, now seen corresponding path program 1 times [2020-07-21 17:36:16,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:16,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020728630] [2020-07-21 17:36:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:17,450 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:36:17,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:17,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:36:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:17,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:17,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020728630] [2020-07-21 17:36:17,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:17,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:36:17,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342509197] [2020-07-21 17:36:17,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:36:17,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:17,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:36:17,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:36:17,681 INFO L87 Difference]: Start difference. First operand 16930 states and 27261 transitions. Second operand 9 states. [2020-07-21 17:36:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:28,959 INFO L93 Difference]: Finished difference Result 130130 states and 208772 transitions. [2020-07-21 17:36:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:36:28,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 502 [2020-07-21 17:36:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:29,106 INFO L225 Difference]: With dead ends: 130130 [2020-07-21 17:36:29,106 INFO L226 Difference]: Without dead ends: 126280 [2020-07-21 17:36:29,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:36:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126280 states. [2020-07-21 17:36:31,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126280 to 42100. [2020-07-21 17:36:31,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42100 states. [2020-07-21 17:36:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42100 states to 42100 states and 67279 transitions. [2020-07-21 17:36:31,130 INFO L78 Accepts]: Start accepts. Automaton has 42100 states and 67279 transitions. Word has length 502 [2020-07-21 17:36:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:31,131 INFO L479 AbstractCegarLoop]: Abstraction has 42100 states and 67279 transitions. [2020-07-21 17:36:31,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:36:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 42100 states and 67279 transitions. [2020-07-21 17:36:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 17:36:31,162 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:31,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:31,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:31,372 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1949345144, now seen corresponding path program 1 times [2020-07-21 17:36:31,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:31,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366419188] [2020-07-21 17:36:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:32,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:36:32,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:33,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:33,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366419188] [2020-07-21 17:36:33,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:33,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 17:36:33,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009135162] [2020-07-21 17:36:33,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:36:33,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:36:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:36:33,426 INFO L87 Difference]: Start difference. First operand 42100 states and 67279 transitions. Second operand 8 states. [2020-07-21 17:36:38,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:38,503 INFO L93 Difference]: Finished difference Result 71716 states and 114947 transitions. [2020-07-21 17:36:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:36:38,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 502 [2020-07-21 17:36:38,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:38,563 INFO L225 Difference]: With dead ends: 71716 [2020-07-21 17:36:38,563 INFO L226 Difference]: Without dead ends: 50630 [2020-07-21 17:36:38,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 17:36:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50630 states. [2020-07-21 17:36:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50630 to 22886. [2020-07-21 17:36:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22886 states. [2020-07-21 17:36:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22886 states to 22886 states and 36425 transitions. [2020-07-21 17:36:39,845 INFO L78 Accepts]: Start accepts. Automaton has 22886 states and 36425 transitions. Word has length 502 [2020-07-21 17:36:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:39,846 INFO L479 AbstractCegarLoop]: Abstraction has 22886 states and 36425 transitions. [2020-07-21 17:36:39,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:36:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22886 states and 36425 transitions. [2020-07-21 17:36:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 17:36:39,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:39,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:40,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:40,078 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:40,079 INFO L82 PathProgramCache]: Analyzing trace with hash -600161981, now seen corresponding path program 1 times [2020-07-21 17:36:40,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:40,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202019805] [2020-07-21 17:36:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:40,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:40,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:40,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:40,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202019805] [2020-07-21 17:36:40,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:40,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:40,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595942632] [2020-07-21 17:36:40,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:40,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:40,724 INFO L87 Difference]: Start difference. First operand 22886 states and 36425 transitions. Second operand 3 states. [2020-07-21 17:36:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:42,349 INFO L93 Difference]: Finished difference Result 48298 states and 76323 transitions. [2020-07-21 17:36:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:42,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 17:36:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:42,387 INFO L225 Difference]: With dead ends: 48298 [2020-07-21 17:36:42,387 INFO L226 Difference]: Without dead ends: 29880 [2020-07-21 17:36:42,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29880 states. [2020-07-21 17:36:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29880 to 25606. [2020-07-21 17:36:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25606 states. [2020-07-21 17:36:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25606 states to 25606 states and 40893 transitions. [2020-07-21 17:36:44,670 INFO L78 Accepts]: Start accepts. Automaton has 25606 states and 40893 transitions. Word has length 502 [2020-07-21 17:36:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:44,670 INFO L479 AbstractCegarLoop]: Abstraction has 25606 states and 40893 transitions. [2020-07-21 17:36:44,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:44,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25606 states and 40893 transitions. [2020-07-21 17:36:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 17:36:44,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:44,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:44,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:44,906 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:44,907 INFO L82 PathProgramCache]: Analyzing trace with hash -940914161, now seen corresponding path program 1 times [2020-07-21 17:36:44,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:44,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264009566] [2020-07-21 17:36:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:45,452 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:45,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:45,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:45,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264009566] [2020-07-21 17:36:45,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:45,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:45,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968311652] [2020-07-21 17:36:45,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:45,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:45,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:45,702 INFO L87 Difference]: Start difference. First operand 25606 states and 40893 transitions. Second operand 3 states. [2020-07-21 17:36:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:48,236 INFO L93 Difference]: Finished difference Result 74881 states and 119388 transitions. [2020-07-21 17:36:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:48,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 17:36:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:48,295 INFO L225 Difference]: With dead ends: 74881 [2020-07-21 17:36:48,295 INFO L226 Difference]: Without dead ends: 50183 [2020-07-21 17:36:48,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50183 states. [2020-07-21 17:36:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50183 to 50181. [2020-07-21 17:36:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50181 states. [2020-07-21 17:36:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50181 states to 50181 states and 79832 transitions. [2020-07-21 17:36:50,950 INFO L78 Accepts]: Start accepts. Automaton has 50181 states and 79832 transitions. Word has length 502 [2020-07-21 17:36:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:50,951 INFO L479 AbstractCegarLoop]: Abstraction has 50181 states and 79832 transitions. [2020-07-21 17:36:50,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 50181 states and 79832 transitions. [2020-07-21 17:36:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 17:36:50,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:50,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:51,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:51,185 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash 227329196, now seen corresponding path program 1 times [2020-07-21 17:36:51,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:51,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030627110] [2020-07-21 17:36:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:51,559 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:36:51,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:36:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:51,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:51,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030627110] [2020-07-21 17:36:51,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:51,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:36:51,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332449992] [2020-07-21 17:36:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:36:51,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:36:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:36:51,721 INFO L87 Difference]: Start difference. First operand 50181 states and 79832 transitions. Second operand 4 states. [2020-07-21 17:36:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:58,002 INFO L93 Difference]: Finished difference Result 144855 states and 229756 transitions. [2020-07-21 17:36:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:36:58,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-21 17:36:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:58,099 INFO L225 Difference]: With dead ends: 144855 [2020-07-21 17:36:58,099 INFO L226 Difference]: Without dead ends: 96877 [2020-07-21 17:36:58,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:36:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96877 states. [2020-07-21 17:37:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96877 to 51522. [2020-07-21 17:37:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51522 states. [2020-07-21 17:37:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51522 states to 51522 states and 82216 transitions. [2020-07-21 17:37:01,171 INFO L78 Accepts]: Start accepts. Automaton has 51522 states and 82216 transitions. Word has length 502 [2020-07-21 17:37:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:37:01,171 INFO L479 AbstractCegarLoop]: Abstraction has 51522 states and 82216 transitions. [2020-07-21 17:37:01,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:37:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 51522 states and 82216 transitions. [2020-07-21 17:37:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 17:37:01,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:37:01,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:37:01,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:01,407 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:37:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:37:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash -980640222, now seen corresponding path program 1 times [2020-07-21 17:37:01,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:37:01,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459123261] [2020-07-21 17:37:01,411 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:01,795 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:37:01,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:37:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:37:01,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:37:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:37:02,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:37:02,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459123261] [2020-07-21 17:37:02,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:37:02,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:37:02,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273794810] [2020-07-21 17:37:02,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:37:02,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:37:02,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:37:02,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:37:02,075 INFO L87 Difference]: Start difference. First operand 51522 states and 82216 transitions. Second operand 9 states. [2020-07-21 17:37:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:37:27,229 INFO L93 Difference]: Finished difference Result 277208 states and 442313 transitions. [2020-07-21 17:37:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 17:37:27,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 504 [2020-07-21 17:37:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:37:27,618 INFO L225 Difference]: With dead ends: 277208 [2020-07-21 17:37:27,619 INFO L226 Difference]: Without dead ends: 262238 [2020-07-21 17:37:27,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=995, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 17:37:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262238 states. [2020-07-21 17:37:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262238 to 106226. [2020-07-21 17:37:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106226 states. [2020-07-21 17:37:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106226 states to 106226 states and 168600 transitions. [2020-07-21 17:37:35,574 INFO L78 Accepts]: Start accepts. Automaton has 106226 states and 168600 transitions. Word has length 504 [2020-07-21 17:37:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:37:35,574 INFO L479 AbstractCegarLoop]: Abstraction has 106226 states and 168600 transitions. [2020-07-21 17:37:35,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:37:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 106226 states and 168600 transitions. [2020-07-21 17:37:35,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 17:37:35,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:37:35,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:37:35,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:35,826 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:37:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:37:35,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2126461271, now seen corresponding path program 1 times [2020-07-21 17:37:35,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:37:35,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061669527] [2020-07-21 17:37:35,828 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:36,356 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:37:36,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:37:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:37:36,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:37:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:37:38,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:37:38,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061669527] [2020-07-21 17:37:38,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:37:38,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:37:38,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719901358] [2020-07-21 17:37:38,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:37:38,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:37:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:37:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:37:38,256 INFO L87 Difference]: Start difference. First operand 106226 states and 168600 transitions. Second operand 3 states. [2020-07-21 17:37:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:37:48,485 INFO L93 Difference]: Finished difference Result 249550 states and 395974 transitions. [2020-07-21 17:37:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:37:48,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 17:37:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:37:48,664 INFO L225 Difference]: With dead ends: 249550 [2020-07-21 17:37:48,665 INFO L226 Difference]: Without dead ends: 153532 [2020-07-21 17:37:48,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:37:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153532 states. [2020-07-21 17:38:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153532 to 134298. [2020-07-21 17:38:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134298 states. [2020-07-21 17:38:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134298 states to 134298 states and 213296 transitions. [2020-07-21 17:38:01,505 INFO L78 Accepts]: Start accepts. Automaton has 134298 states and 213296 transitions. Word has length 504 [2020-07-21 17:38:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:38:01,506 INFO L479 AbstractCegarLoop]: Abstraction has 134298 states and 213296 transitions. [2020-07-21 17:38:01,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:38:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 134298 states and 213296 transitions. [2020-07-21 17:38:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 17:38:01,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:38:01,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:38:01,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:01,796 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:38:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:38:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash 359846569, now seen corresponding path program 1 times [2020-07-21 17:38:01,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:38:01,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106895384] [2020-07-21 17:38:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:02,339 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:38:02,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:38:02,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:38:02,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:38:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:38:02,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:38:02,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106895384] [2020-07-21 17:38:02,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:38:02,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:38:02,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707614060] [2020-07-21 17:38:02,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:38:02,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:38:02,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:38:02,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:38:02,775 INFO L87 Difference]: Start difference. First operand 134298 states and 213296 transitions. Second operand 5 states. [2020-07-21 17:38:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:38:23,331 INFO L93 Difference]: Finished difference Result 337578 states and 538034 transitions. [2020-07-21 17:38:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:38:23,331 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-21 17:38:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:38:23,709 INFO L225 Difference]: With dead ends: 337578 [2020-07-21 17:38:23,709 INFO L226 Difference]: Without dead ends: 254416 [2020-07-21 17:38:23,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:38:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254416 states. [2020-07-21 17:38:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254416 to 254414. [2020-07-21 17:38:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254414 states. [2020-07-21 17:38:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254414 states to 254414 states and 402832 transitions. [2020-07-21 17:38:50,137 INFO L78 Accepts]: Start accepts. Automaton has 254414 states and 402832 transitions. Word has length 505 [2020-07-21 17:38:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:38:50,138 INFO L479 AbstractCegarLoop]: Abstraction has 254414 states and 402832 transitions. [2020-07-21 17:38:50,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:38:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 254414 states and 402832 transitions. [2020-07-21 17:38:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 17:38:50,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:38:50,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:38:50,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:50,426 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:38:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:38:50,427 INFO L82 PathProgramCache]: Analyzing trace with hash -69343826, now seen corresponding path program 1 times [2020-07-21 17:38:50,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:38:50,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272976820] [2020-07-21 17:38:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:38:50,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:38:50,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:38:50,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 3081 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:38:50,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:38:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:38:51,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:38:51,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272976820] [2020-07-21 17:38:51,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:38:51,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:38:51,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001866918] [2020-07-21 17:38:51,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:38:51,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:38:51,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:38:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:38:51,608 INFO L87 Difference]: Start difference. First operand 254414 states and 402832 transitions. Second operand 4 states. [2020-07-21 17:39:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:39:34,675 INFO L93 Difference]: Finished difference Result 756521 states and 1198056 transitions. [2020-07-21 17:39:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:39:34,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 17:39:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:39:35,464 INFO L225 Difference]: With dead ends: 756521 [2020-07-21 17:39:35,464 INFO L226 Difference]: Without dead ends: 502369 [2020-07-21 17:39:35,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:39:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502369 states. [2020-07-21 17:40:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502369 to 502315. [2020-07-21 17:40:30,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502315 states. [2020-07-21 17:40:31,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502315 states to 502315 states and 793028 transitions. [2020-07-21 17:40:31,386 INFO L78 Accepts]: Start accepts. Automaton has 502315 states and 793028 transitions. Word has length 505 [2020-07-21 17:40:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:40:31,386 INFO L479 AbstractCegarLoop]: Abstraction has 502315 states and 793028 transitions. [2020-07-21 17:40:31,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:40:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 502315 states and 793028 transitions. [2020-07-21 17:40:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 17:40:31,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:31,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:40:31,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:31,769 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:31,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1622683161, now seen corresponding path program 1 times [2020-07-21 17:40:31,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:31,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673139063] [2020-07-21 17:40:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:32,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:40:32,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:40:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1701 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:40:32,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:40:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:40:32,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:40:32,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673139063] [2020-07-21 17:40:32,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:40:32,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:40:32,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635930607] [2020-07-21 17:40:32,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:40:32,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:40:32,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:40:32,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:40:32,273 INFO L87 Difference]: Start difference. First operand 502315 states and 793028 transitions. Second operand 3 states. [2020-07-21 17:42:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:42:08,739 INFO L93 Difference]: Finished difference Result 1493954 states and 2355644 transitions. [2020-07-21 17:42:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:42:08,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-21 17:42:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:42:10,221 INFO L225 Difference]: With dead ends: 1493954 [2020-07-21 17:42:10,221 INFO L226 Difference]: Without dead ends: 998149 [2020-07-21 17:42:10,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:42:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998149 states. [2020-07-21 17:43:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998149 to 503259. [2020-07-21 17:43:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503259 states. [2020-07-21 17:43:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503259 states to 503259 states and 794422 transitions. [2020-07-21 17:43:22,388 INFO L78 Accepts]: Start accepts. Automaton has 503259 states and 794422 transitions. Word has length 506 [2020-07-21 17:43:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:43:22,388 INFO L479 AbstractCegarLoop]: Abstraction has 503259 states and 794422 transitions. [2020-07-21 17:43:22,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:43:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 503259 states and 794422 transitions. [2020-07-21 17:43:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 17:43:22,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:43:22,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:43:22,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:43:22,777 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:43:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:43:22,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1686331367, now seen corresponding path program 1 times [2020-07-21 17:43:22,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:43:22,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844487253] [2020-07-21 17:43:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:43:23,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:43:23,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:43:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 3084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:43:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:43:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:43:23,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:43:23,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844487253] [2020-07-21 17:43:23,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:43:23,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:43:23,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011528863] [2020-07-21 17:43:23,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:43:23,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:43:23,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:43:23,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:43:23,581 INFO L87 Difference]: Start difference. First operand 503259 states and 794422 transitions. Second operand 3 states. [2020-07-21 17:45:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:45:02,694 INFO L93 Difference]: Finished difference Result 1488069 states and 2349578 transitions. [2020-07-21 17:45:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:45:02,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 17:45:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:45:04,298 INFO L225 Difference]: With dead ends: 1488069 [2020-07-21 17:45:04,298 INFO L226 Difference]: Without dead ends: 987195 [2020-07-21 17:45:04,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:45:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987195 states. [2020-07-21 17:47:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987195 to 987164. [2020-07-21 17:47:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 987164 states. [2020-07-21 17:47:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987164 states to 987164 states and 1552526 transitions. [2020-07-21 17:47:02,326 INFO L78 Accepts]: Start accepts. Automaton has 987164 states and 1552526 transitions. Word has length 507 [2020-07-21 17:47:02,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:47:02,326 INFO L479 AbstractCegarLoop]: Abstraction has 987164 states and 1552526 transitions. [2020-07-21 17:47:02,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:47:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 987164 states and 1552526 transitions. [2020-07-21 17:47:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 17:47:02,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:47:02,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:47:02,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:47:02,936 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:47:02,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:47:02,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1230868770, now seen corresponding path program 1 times [2020-07-21 17:47:02,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:47:02,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104361053] [2020-07-21 17:47:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:47:03,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:47:03,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:47:03,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:47:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:47:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:47:03,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:47:03,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104361053] [2020-07-21 17:47:03,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:47:03,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:47:03,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201414476] [2020-07-21 17:47:03,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:47:03,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:47:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:47:03,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:47:03,722 INFO L87 Difference]: Start difference. First operand 987164 states and 1552526 transitions. Second operand 3 states.