/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_FUNCTIONS --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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:42:40,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:42:40,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:42:40,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:42:40,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:42:40,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:42:40,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:42:40,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:42:40,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:42:40,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:42:40,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:42:40,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:42:40,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:42:40,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:42:40,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:42:40,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:42:40,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:42:40,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:42:40,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:42:40,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:42:40,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:42:40,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:42:40,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:42:40,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:42:40,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:42:40,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:42:40,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:42:40,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:42:40,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:42:40,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 14:42:40,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:42:40,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:42:40,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:42:40,592 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 14:42:40,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:42:40,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:42:40,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:42:40,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:42:40,614 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:42:40,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:42:40,614 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:42:40,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:42:40,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:42:40,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:42:40,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:42:40,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:42:40,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:42:40,617 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:42:40,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:42:40,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:42:40,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:42:40,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:42:40,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:42:40,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:42:40,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:42:40,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:42:40,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:42:40,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:42:40,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:42:40,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:42:40,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:40,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:42:40,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:42:40,620 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_FUNCTIONS 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 14:42:40,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:42:40,938 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:42:40,941 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:42:40,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:42:40,943 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:42:40,944 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 14:42:41,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654c657ae/291e7325324a4818b32b806255d92cbe/FLAG0d58cc800 [2020-07-21 14:42:41,631 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:42:41,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 14:42:41,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654c657ae/291e7325324a4818b32b806255d92cbe/FLAG0d58cc800 [2020-07-21 14:42:41,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654c657ae/291e7325324a4818b32b806255d92cbe [2020-07-21 14:42:41,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:42:41,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:42:41,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:42:41,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:42:41,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:42:41,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:42:41" (1/1) ... [2020-07-21 14:42:41,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51833862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:41, skipping insertion in model container [2020-07-21 14:42:41,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:42:41" (1/1) ... [2020-07-21 14:42:41,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:42:42,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:42:43,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:42:43,404 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:42:44,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:42:44,289 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:42:44,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44 WrapperNode [2020-07-21 14:42:44,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:42:44,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:42:44,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:42:44,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:42:44,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (1/1) ... [2020-07-21 14:42:44,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (1/1) ... [2020-07-21 14:42:44,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (1/1) ... [2020-07-21 14:42:44,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (1/1) ... [2020-07-21 14:42:44,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (1/1) ... [2020-07-21 14:42:44,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (1/1) ... [2020-07-21 14:42:44,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (1/1) ... [2020-07-21 14:42:44,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:42:44,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:42:44,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:42:44,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:42:44,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (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 14:42:44,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:42:44,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:42:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:42:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:42:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:42:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:42:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:42:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:42:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:42:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:42:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:42:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:42:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:42:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:42:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:42:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:42:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:42:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:42:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:42:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:42:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:42:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:42:48,353 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:42:48,353 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:42:48,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:42:48 BoogieIcfgContainer [2020-07-21 14:42:48,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:42:48,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:42:48,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:42:48,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:42:48,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:42:41" (1/3) ... [2020-07-21 14:42:48,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509e7525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:42:48, skipping insertion in model container [2020-07-21 14:42:48,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:42:44" (2/3) ... [2020-07-21 14:42:48,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509e7525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:42:48, skipping insertion in model container [2020-07-21 14:42:48,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:42:48" (3/3) ... [2020-07-21 14:42:48,379 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 14:42:48,392 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:42:48,404 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:42:48,418 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:42:48,451 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:42:48,451 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:42:48,451 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:42:48,452 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:42:48,452 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:42:48,452 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:42:48,452 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:42:48,452 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:42:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-21 14:42:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 14:42:48,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:48,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:48,536 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-21 14:42:48,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:48,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874321617] [2020-07-21 14:42:48,552 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 14:42:49,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:42:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:49,590 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 14:42:49,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:49,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874321617] [2020-07-21 14:42:49,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:49,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:42:49,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561410690] [2020-07-21 14:42:49,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:42:49,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:49,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:42:49,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:42:49,613 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 4 states. [2020-07-21 14:42:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:50,114 INFO L93 Difference]: Finished difference Result 3817 states and 6877 transitions. [2020-07-21 14:42:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:42:50,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-21 14:42:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:50,155 INFO L225 Difference]: With dead ends: 3817 [2020-07-21 14:42:50,156 INFO L226 Difference]: Without dead ends: 2562 [2020-07-21 14:42:50,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 464 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 14:42:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2020-07-21 14:42:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2560. [2020-07-21 14:42:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2020-07-21 14:42:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 4197 transitions. [2020-07-21 14:42:50,336 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 4197 transitions. Word has length 467 [2020-07-21 14:42:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:50,338 INFO L479 AbstractCegarLoop]: Abstraction has 2560 states and 4197 transitions. [2020-07-21 14:42:50,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:42:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 4197 transitions. [2020-07-21 14:42:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 14:42:50,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:50,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:50,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:50,567 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:50,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1555265532, now seen corresponding path program 1 times [2020-07-21 14:42:50,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:50,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603374201] [2020-07-21 14:42:50,569 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 14:42:50,999 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:51,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:51,283 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 14:42:51,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:51,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603374201] [2020-07-21 14:42:51,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:51,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:51,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895686797] [2020-07-21 14:42:51,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:51,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:51,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:51,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:51,287 INFO L87 Difference]: Start difference. First operand 2560 states and 4197 transitions. Second operand 3 states. [2020-07-21 14:42:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:51,581 INFO L93 Difference]: Finished difference Result 7365 states and 12026 transitions. [2020-07-21 14:42:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:42:51,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-21 14:42:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:51,608 INFO L225 Difference]: With dead ends: 7365 [2020-07-21 14:42:51,609 INFO L226 Difference]: Without dead ends: 4971 [2020-07-21 14:42:51,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2020-07-21 14:42:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4969. [2020-07-21 14:42:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4969 states. [2020-07-21 14:42:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 8099 transitions. [2020-07-21 14:42:51,822 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 8099 transitions. Word has length 469 [2020-07-21 14:42:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:51,823 INFO L479 AbstractCegarLoop]: Abstraction has 4969 states and 8099 transitions. [2020-07-21 14:42:51,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:42:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 8099 transitions. [2020-07-21 14:42:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 14:42:51,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:51,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:52,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:52,072 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1897349353, now seen corresponding path program 1 times [2020-07-21 14:42:52,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:52,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975169628] [2020-07-21 14:42:52,075 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 14:42:52,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:52,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:52,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:52,794 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 14:42:52,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:52,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975169628] [2020-07-21 14:42:52,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:52,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:52,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509421394] [2020-07-21 14:42:52,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:52,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:52,799 INFO L87 Difference]: Start difference. First operand 4969 states and 8099 transitions. Second operand 3 states. [2020-07-21 14:42:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:53,125 INFO L93 Difference]: Finished difference Result 14391 states and 23355 transitions. [2020-07-21 14:42:53,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:42:53,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 14:42:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:53,174 INFO L225 Difference]: With dead ends: 14391 [2020-07-21 14:42:53,174 INFO L226 Difference]: Without dead ends: 9683 [2020-07-21 14:42:53,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9683 states. [2020-07-21 14:42:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9683 to 5021. [2020-07-21 14:42:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5021 states. [2020-07-21 14:42:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 8179 transitions. [2020-07-21 14:42:53,534 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 8179 transitions. Word has length 470 [2020-07-21 14:42:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:53,534 INFO L479 AbstractCegarLoop]: Abstraction has 5021 states and 8179 transitions. [2020-07-21 14:42:53,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:42:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 8179 transitions. [2020-07-21 14:42:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 14:42:53,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:53,552 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] [2020-07-21 14:42:53,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:53,768 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1480993089, now seen corresponding path program 1 times [2020-07-21 14:42:53,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:53,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783199501] [2020-07-21 14:42:53,771 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 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 14:42:54,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:54,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:54,428 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 14:42:54,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:54,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783199501] [2020-07-21 14:42:54,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:54,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:54,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175157679] [2020-07-21 14:42:54,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:54,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:54,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:54,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:54,431 INFO L87 Difference]: Start difference. First operand 5021 states and 8179 transitions. Second operand 3 states. [2020-07-21 14:42:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:54,846 INFO L93 Difference]: Finished difference Result 14620 states and 23754 transitions. [2020-07-21 14:42:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:42:54,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 14:42:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:54,890 INFO L225 Difference]: With dead ends: 14620 [2020-07-21 14:42:54,891 INFO L226 Difference]: Without dead ends: 9859 [2020-07-21 14:42:54,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 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 14:42:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9859 states. [2020-07-21 14:42:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9859 to 9857. [2020-07-21 14:42:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9857 states. [2020-07-21 14:42:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 15980 transitions. [2020-07-21 14:42:55,273 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 15980 transitions. Word has length 471 [2020-07-21 14:42:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:55,274 INFO L479 AbstractCegarLoop]: Abstraction has 9857 states and 15980 transitions. [2020-07-21 14:42:55,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:42:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 15980 transitions. [2020-07-21 14:42:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 14:42:55,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:55,306 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] [2020-07-21 14:42:55,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:55,520 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1554789404, now seen corresponding path program 1 times [2020-07-21 14:42:55,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:55,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900488837] [2020-07-21 14:42:55,521 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 14:42:55,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:55,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:55,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:56,098 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 14:42:56,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:56,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900488837] [2020-07-21 14:42:56,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:56,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:56,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336068254] [2020-07-21 14:42:56,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:56,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:56,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:56,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:56,101 INFO L87 Difference]: Start difference. First operand 9857 states and 15980 transitions. Second operand 3 states. [2020-07-21 14:42:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:56,563 INFO L93 Difference]: Finished difference Result 28587 states and 46164 transitions. [2020-07-21 14:42:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:42:56,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 14:42:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:56,611 INFO L225 Difference]: With dead ends: 28587 [2020-07-21 14:42:56,611 INFO L226 Difference]: Without dead ends: 19223 [2020-07-21 14:42:56,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 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 14:42:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19223 states. [2020-07-21 14:42:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19223 to 9997. [2020-07-21 14:42:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9997 states. [2020-07-21 14:42:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9997 states to 9997 states and 16176 transitions. [2020-07-21 14:42:57,745 INFO L78 Accepts]: Start accepts. Automaton has 9997 states and 16176 transitions. Word has length 471 [2020-07-21 14:42:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:57,746 INFO L479 AbstractCegarLoop]: Abstraction has 9997 states and 16176 transitions. [2020-07-21 14:42:57,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:42:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 9997 states and 16176 transitions. [2020-07-21 14:42:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-21 14:42:57,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:57,769 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] [2020-07-21 14:42:57,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:57,986 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1797411838, now seen corresponding path program 1 times [2020-07-21 14:42:57,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:57,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155249813] [2020-07-21 14:42:57,987 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 14:42:58,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:58,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:58,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:58,463 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 14:42:58,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:58,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155249813] [2020-07-21 14:42:58,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:58,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:58,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068799500] [2020-07-21 14:42:58,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:58,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:58,467 INFO L87 Difference]: Start difference. First operand 9997 states and 16176 transitions. Second operand 3 states. [2020-07-21 14:42:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:59,005 INFO L93 Difference]: Finished difference Result 28881 states and 46576 transitions. [2020-07-21 14:42:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:42:59,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-21 14:42:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:59,039 INFO L225 Difference]: With dead ends: 28881 [2020-07-21 14:42:59,039 INFO L226 Difference]: Without dead ends: 19431 [2020-07-21 14:42:59,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 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 14:42:59,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19431 states. [2020-07-21 14:42:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19431 to 10205. [2020-07-21 14:42:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10205 states. [2020-07-21 14:42:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 16460 transitions. [2020-07-21 14:42:59,478 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 16460 transitions. Word has length 472 [2020-07-21 14:42:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:59,478 INFO L479 AbstractCegarLoop]: Abstraction has 10205 states and 16460 transitions. [2020-07-21 14:42:59,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:42:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 16460 transitions. [2020-07-21 14:42:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 14:42:59,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:59,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:59,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:59,718 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash 526601830, now seen corresponding path program 1 times [2020-07-21 14:42:59,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:59,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489473941] [2020-07-21 14:42:59,721 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 14:43:00,048 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:00,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:00,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:00,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:00,284 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 14:43:00,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:00,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489473941] [2020-07-21 14:43:00,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:00,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:00,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005281467] [2020-07-21 14:43:00,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:00,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:00,287 INFO L87 Difference]: Start difference. First operand 10205 states and 16460 transitions. Second operand 3 states. [2020-07-21 14:43:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:00,776 INFO L93 Difference]: Finished difference Result 29712 states and 47848 transitions. [2020-07-21 14:43:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:00,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-21 14:43:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:00,811 INFO L225 Difference]: With dead ends: 29712 [2020-07-21 14:43:00,811 INFO L226 Difference]: Without dead ends: 20040 [2020-07-21 14:43:00,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20040 states. [2020-07-21 14:43:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20040 to 20038. [2020-07-21 14:43:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20038 states. [2020-07-21 14:43:01,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20038 states to 20038 states and 32169 transitions. [2020-07-21 14:43:01,639 INFO L78 Accepts]: Start accepts. Automaton has 20038 states and 32169 transitions. Word has length 473 [2020-07-21 14:43:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:01,640 INFO L479 AbstractCegarLoop]: Abstraction has 20038 states and 32169 transitions. [2020-07-21 14:43:01,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20038 states and 32169 transitions. [2020-07-21 14:43:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 14:43:01,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:01,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:01,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:01,889 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:01,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:01,890 INFO L82 PathProgramCache]: Analyzing trace with hash -797846807, now seen corresponding path program 1 times [2020-07-21 14:43:01,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:01,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993044230] [2020-07-21 14:43:01,892 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 14:43:02,249 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:02,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:43:02,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:02,392 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 14:43:02,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:02,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993044230] [2020-07-21 14:43:02,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:02,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:02,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774840577] [2020-07-21 14:43:02,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:02,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:02,395 INFO L87 Difference]: Start difference. First operand 20038 states and 32169 transitions. Second operand 4 states. [2020-07-21 14:43:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:04,306 INFO L93 Difference]: Finished difference Result 53649 states and 85509 transitions. [2020-07-21 14:43:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:04,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 14:43:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:04,358 INFO L225 Difference]: With dead ends: 53649 [2020-07-21 14:43:04,359 INFO L226 Difference]: Without dead ends: 37535 [2020-07-21 14:43:04,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 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 14:43:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37535 states. [2020-07-21 14:43:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37535 to 22688. [2020-07-21 14:43:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22688 states. [2020-07-21 14:43:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22688 states to 22688 states and 36807 transitions. [2020-07-21 14:43:05,232 INFO L78 Accepts]: Start accepts. Automaton has 22688 states and 36807 transitions. Word has length 473 [2020-07-21 14:43:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:05,233 INFO L479 AbstractCegarLoop]: Abstraction has 22688 states and 36807 transitions. [2020-07-21 14:43:05,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 22688 states and 36807 transitions. [2020-07-21 14:43:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 14:43:05,265 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:05,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:05,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:05,479 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:05,481 INFO L82 PathProgramCache]: Analyzing trace with hash 513347231, now seen corresponding path program 1 times [2020-07-21 14:43:05,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:05,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10040038] [2020-07-21 14:43:05,482 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 14:43:06,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:06,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:06,148 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 14:43:06,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:06,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10040038] [2020-07-21 14:43:06,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:06,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:06,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4683232] [2020-07-21 14:43:06,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:06,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:06,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:06,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:06,153 INFO L87 Difference]: Start difference. First operand 22688 states and 36807 transitions. Second operand 3 states. [2020-07-21 14:43:07,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:07,240 INFO L93 Difference]: Finished difference Result 55047 states and 87684 transitions. [2020-07-21 14:43:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:07,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 14:43:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:07,294 INFO L225 Difference]: With dead ends: 55047 [2020-07-21 14:43:07,294 INFO L226 Difference]: Without dead ends: 38882 [2020-07-21 14:43:07,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 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 14:43:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38882 states. [2020-07-21 14:43:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38882 to 23152. [2020-07-21 14:43:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23152 states. [2020-07-21 14:43:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 37517 transitions. [2020-07-21 14:43:08,533 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 37517 transitions. Word has length 476 [2020-07-21 14:43:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:08,533 INFO L479 AbstractCegarLoop]: Abstraction has 23152 states and 37517 transitions. [2020-07-21 14:43:08,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 37517 transitions. [2020-07-21 14:43:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 14:43:08,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:08,555 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] [2020-07-21 14:43:08,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:08,762 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1688196562, now seen corresponding path program 1 times [2020-07-21 14:43:08,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:08,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067538823] [2020-07-21 14:43:08,765 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 14:43:09,108 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:09,224 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 14:43:09,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:09,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067538823] [2020-07-21 14:43:09,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:09,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:09,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907697151] [2020-07-21 14:43:09,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:09,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:09,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:09,226 INFO L87 Difference]: Start difference. First operand 23152 states and 37517 transitions. Second operand 3 states. [2020-07-21 14:43:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:10,361 INFO L93 Difference]: Finished difference Result 55916 states and 88933 transitions. [2020-07-21 14:43:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:10,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2020-07-21 14:43:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:10,410 INFO L225 Difference]: With dead ends: 55916 [2020-07-21 14:43:10,410 INFO L226 Difference]: Without dead ends: 39519 [2020-07-21 14:43:10,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 475 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 14:43:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39519 states. [2020-07-21 14:43:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39519 to 23757. [2020-07-21 14:43:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23757 states. [2020-07-21 14:43:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23757 states to 23757 states and 38331 transitions. [2020-07-21 14:43:12,362 INFO L78 Accepts]: Start accepts. Automaton has 23757 states and 38331 transitions. Word has length 477 [2020-07-21 14:43:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:12,363 INFO L479 AbstractCegarLoop]: Abstraction has 23757 states and 38331 transitions. [2020-07-21 14:43:12,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23757 states and 38331 transitions. [2020-07-21 14:43:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 14:43:12,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:12,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:12,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:12,608 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1659246368, now seen corresponding path program 1 times [2020-07-21 14:43:12,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:12,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544001992] [2020-07-21 14:43:12,611 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 14:43:12,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:12,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:12,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:13,089 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 14:43:13,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:13,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544001992] [2020-07-21 14:43:13,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:13,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:13,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005611876] [2020-07-21 14:43:13,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:13,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:13,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:13,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:13,092 INFO L87 Difference]: Start difference. First operand 23757 states and 38331 transitions. Second operand 3 states. [2020-07-21 14:43:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:14,374 INFO L93 Difference]: Finished difference Result 56938 states and 90240 transitions. [2020-07-21 14:43:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:14,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 14:43:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:14,423 INFO L225 Difference]: With dead ends: 56938 [2020-07-21 14:43:14,423 INFO L226 Difference]: Without dead ends: 40366 [2020-07-21 14:43:14,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40366 states. [2020-07-21 14:43:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40366 to 24636. [2020-07-21 14:43:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24636 states. [2020-07-21 14:43:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24636 states to 24636 states and 39484 transitions. [2020-07-21 14:43:15,365 INFO L78 Accepts]: Start accepts. Automaton has 24636 states and 39484 transitions. Word has length 478 [2020-07-21 14:43:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:15,366 INFO L479 AbstractCegarLoop]: Abstraction has 24636 states and 39484 transitions. [2020-07-21 14:43:15,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 24636 states and 39484 transitions. [2020-07-21 14:43:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 14:43:15,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:15,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:15,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:15,607 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:15,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:15,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1705317220, now seen corresponding path program 1 times [2020-07-21 14:43:15,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:15,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907611393] [2020-07-21 14:43:15,610 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 14:43:15,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:15,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:15,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:16,163 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 14:43:16,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:16,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907611393] [2020-07-21 14:43:16,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:16,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:16,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171084318] [2020-07-21 14:43:16,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:16,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:16,166 INFO L87 Difference]: Start difference. First operand 24636 states and 39484 transitions. Second operand 4 states. [2020-07-21 14:43:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:17,968 INFO L93 Difference]: Finished difference Result 73415 states and 117624 transitions. [2020-07-21 14:43:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:17,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-21 14:43:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:18,018 INFO L225 Difference]: With dead ends: 73415 [2020-07-21 14:43:18,018 INFO L226 Difference]: Without dead ends: 48834 [2020-07-21 14:43:18,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 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 14:43:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48834 states. [2020-07-21 14:43:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48834 to 48832. [2020-07-21 14:43:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48832 states. [2020-07-21 14:43:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48832 states to 48832 states and 77928 transitions. [2020-07-21 14:43:20,023 INFO L78 Accepts]: Start accepts. Automaton has 48832 states and 77928 transitions. Word has length 479 [2020-07-21 14:43:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:20,023 INFO L479 AbstractCegarLoop]: Abstraction has 48832 states and 77928 transitions. [2020-07-21 14:43:20,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:20,024 INFO L276 IsEmpty]: Start isEmpty. Operand 48832 states and 77928 transitions. [2020-07-21 14:43:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 14:43:20,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:20,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:20,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:20,262 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1992291664, now seen corresponding path program 1 times [2020-07-21 14:43:20,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:20,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144515830] [2020-07-21 14:43:20,264 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 14:43:20,609 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:20,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:20,821 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 14:43:20,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:20,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144515830] [2020-07-21 14:43:20,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:20,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:20,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720680422] [2020-07-21 14:43:20,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:20,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:20,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:20,824 INFO L87 Difference]: Start difference. First operand 48832 states and 77928 transitions. Second operand 3 states. [2020-07-21 14:43:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:25,104 INFO L93 Difference]: Finished difference Result 145138 states and 231474 transitions. [2020-07-21 14:43:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:25,104 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 14:43:25,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:25,199 INFO L225 Difference]: With dead ends: 145138 [2020-07-21 14:43:25,200 INFO L226 Difference]: Without dead ends: 96826 [2020-07-21 14:43:25,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:25,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96826 states. [2020-07-21 14:43:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96826 to 96824. [2020-07-21 14:43:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96824 states. [2020-07-21 14:43:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96824 states to 96824 states and 153893 transitions. [2020-07-21 14:43:28,916 INFO L78 Accepts]: Start accepts. Automaton has 96824 states and 153893 transitions. Word has length 481 [2020-07-21 14:43:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:28,917 INFO L479 AbstractCegarLoop]: Abstraction has 96824 states and 153893 transitions. [2020-07-21 14:43:28,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 96824 states and 153893 transitions. [2020-07-21 14:43:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 14:43:28,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:28,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:29,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:29,197 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:29,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1314473133, now seen corresponding path program 1 times [2020-07-21 14:43:29,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:29,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630616026] [2020-07-21 14:43:29,199 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 14:43:29,542 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:29,659 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 14:43:29,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:29,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630616026] [2020-07-21 14:43:29,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:29,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:29,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636094832] [2020-07-21 14:43:29,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:29,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:29,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:29,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:29,661 INFO L87 Difference]: Start difference. First operand 96824 states and 153893 transitions. Second operand 3 states. [2020-07-21 14:43:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:37,788 INFO L93 Difference]: Finished difference Result 289848 states and 460566 transitions. [2020-07-21 14:43:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:37,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 14:43:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:38,001 INFO L225 Difference]: With dead ends: 289848 [2020-07-21 14:43:38,002 INFO L226 Difference]: Without dead ends: 193164 [2020-07-21 14:43:38,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193164 states. [2020-07-21 14:43:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193164 to 96905. [2020-07-21 14:43:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96905 states. [2020-07-21 14:43:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96905 states to 96905 states and 154016 transitions. [2020-07-21 14:43:45,181 INFO L78 Accepts]: Start accepts. Automaton has 96905 states and 154016 transitions. Word has length 482 [2020-07-21 14:43:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:45,181 INFO L479 AbstractCegarLoop]: Abstraction has 96905 states and 154016 transitions. [2020-07-21 14:43:45,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 96905 states and 154016 transitions. [2020-07-21 14:43:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 14:43:45,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:45,259 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] [2020-07-21 14:43:45,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:45,460 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:45,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:45,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1224021419, now seen corresponding path program 1 times [2020-07-21 14:43:45,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:45,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703345862] [2020-07-21 14:43:45,462 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 14:43:45,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:45,974 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 14:43:45,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:45,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703345862] [2020-07-21 14:43:45,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:45,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:45,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721755433] [2020-07-21 14:43:45,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:45,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:45,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:45,976 INFO L87 Difference]: Start difference. First operand 96905 states and 154016 transitions. Second operand 3 states. [2020-07-21 14:43:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:55,869 INFO L93 Difference]: Finished difference Result 288714 states and 458742 transitions. [2020-07-21 14:43:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:55,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 14:43:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:56,064 INFO L225 Difference]: With dead ends: 288714 [2020-07-21 14:43:56,064 INFO L226 Difference]: Without dead ends: 192479 [2020-07-21 14:43:56,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 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 14:43:56,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192479 states. [2020-07-21 14:44:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192479 to 192477. [2020-07-21 14:44:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192477 states. [2020-07-21 14:44:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192477 states to 192477 states and 304751 transitions. [2020-07-21 14:44:07,566 INFO L78 Accepts]: Start accepts. Automaton has 192477 states and 304751 transitions. Word has length 483 [2020-07-21 14:44:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:07,567 INFO L479 AbstractCegarLoop]: Abstraction has 192477 states and 304751 transitions. [2020-07-21 14:44:07,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 192477 states and 304751 transitions. [2020-07-21 14:44:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 14:44:07,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:07,727 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] [2020-07-21 14:44:07,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:07,929 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:07,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:07,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1640289328, now seen corresponding path program 1 times [2020-07-21 14:44:07,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:07,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949737553] [2020-07-21 14:44:07,931 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 14:44:08,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:08,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:08,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:08,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:08,655 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 14:44:08,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:08,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949737553] [2020-07-21 14:44:08,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:08,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:08,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856235245] [2020-07-21 14:44:08,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:08,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:08,658 INFO L87 Difference]: Start difference. First operand 192477 states and 304751 transitions. Second operand 3 states. [2020-07-21 14:44:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:28,501 INFO L93 Difference]: Finished difference Result 576099 states and 911919 transitions. [2020-07-21 14:44:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:28,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 14:44:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:28,932 INFO L225 Difference]: With dead ends: 576099 [2020-07-21 14:44:28,933 INFO L226 Difference]: Without dead ends: 384245 [2020-07-21 14:44:29,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 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 14:44:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384245 states. [2020-07-21 14:44:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384245 to 192691. [2020-07-21 14:44:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192691 states. [2020-07-21 14:44:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192691 states to 192691 states and 305027 transitions. [2020-07-21 14:44:40,015 INFO L78 Accepts]: Start accepts. Automaton has 192691 states and 305027 transitions. Word has length 483 [2020-07-21 14:44:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:40,015 INFO L479 AbstractCegarLoop]: Abstraction has 192691 states and 305027 transitions. [2020-07-21 14:44:40,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 192691 states and 305027 transitions. [2020-07-21 14:44:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 14:44:40,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:40,784 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] [2020-07-21 14:44:40,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:40,985 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:40,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1230143316, now seen corresponding path program 1 times [2020-07-21 14:44:40,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:40,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158908097] [2020-07-21 14:44:40,987 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 14:44:41,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:41,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:41,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:41,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:41,436 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 14:44:41,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:41,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158908097] [2020-07-21 14:44:41,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:41,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:41,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473345314] [2020-07-21 14:44:41,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:41,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:41,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:41,439 INFO L87 Difference]: Start difference. First operand 192691 states and 305027 transitions. Second operand 3 states. [2020-07-21 14:45:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:01,769 INFO L93 Difference]: Finished difference Result 573240 states and 907468 transitions. [2020-07-21 14:45:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:45:01,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 14:45:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:02,213 INFO L225 Difference]: With dead ends: 573240 [2020-07-21 14:45:02,213 INFO L226 Difference]: Without dead ends: 380670 [2020-07-21 14:45:02,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 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 14:45:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380670 states. [2020-07-21 14:45:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380670 to 192812. [2020-07-21 14:45:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192812 states. [2020-07-21 14:45:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192812 states to 192812 states and 305167 transitions. [2020-07-21 14:45:20,176 INFO L78 Accepts]: Start accepts. Automaton has 192812 states and 305167 transitions. Word has length 484 [2020-07-21 14:45:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:20,177 INFO L479 AbstractCegarLoop]: Abstraction has 192812 states and 305167 transitions. [2020-07-21 14:45:20,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:45:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 192812 states and 305167 transitions. [2020-07-21 14:45:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 14:45:20,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:20,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:45:20,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:20,550 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:20,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1579483962, now seen corresponding path program 1 times [2020-07-21 14:45:20,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:20,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794607706] [2020-07-21 14:45:20,552 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 14:45:20,921 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:45:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:20,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:45:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:21,046 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 14:45:21,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:21,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794607706] [2020-07-21 14:45:21,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:21,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:45:21,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131521966] [2020-07-21 14:45:21,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:45:21,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:45:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:45:21,048 INFO L87 Difference]: Start difference. First operand 192812 states and 305167 transitions. Second operand 4 states. [2020-07-21 14:45:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:37,092 INFO L93 Difference]: Finished difference Result 438432 states and 696749 transitions. [2020-07-21 14:45:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:45:37,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 14:45:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:37,377 INFO L225 Difference]: With dead ends: 438432 [2020-07-21 14:45:37,377 INFO L226 Difference]: Without dead ends: 245639 [2020-07-21 14:45:37,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 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 14:45:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245639 states. [2020-07-21 14:45:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245639 to 193503. [2020-07-21 14:45:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193503 states. [2020-07-21 14:45:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193503 states to 193503 states and 306207 transitions. [2020-07-21 14:45:50,185 INFO L78 Accepts]: Start accepts. Automaton has 193503 states and 306207 transitions. Word has length 485 [2020-07-21 14:45:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:50,185 INFO L479 AbstractCegarLoop]: Abstraction has 193503 states and 306207 transitions. [2020-07-21 14:45:50,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:45:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 193503 states and 306207 transitions. [2020-07-21 14:45:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:45:50,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:50,353 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] [2020-07-21 14:45:50,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:50,554 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash 366558416, now seen corresponding path program 1 times [2020-07-21 14:45:50,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:50,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478894351] [2020-07-21 14:45:50,556 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 14:45:50,910 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:45:50,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:45:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:51,006 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 14:45:51,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:51,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478894351] [2020-07-21 14:45:51,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:51,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:45:51,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830053846] [2020-07-21 14:45:51,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:45:51,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:45:51,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:51,008 INFO L87 Difference]: Start difference. First operand 193503 states and 306207 transitions. Second operand 3 states. [2020-07-21 14:46:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:15,267 INFO L93 Difference]: Finished difference Result 580114 states and 918014 transitions. [2020-07-21 14:46:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:15,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 14:46:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:15,697 INFO L225 Difference]: With dead ends: 580114 [2020-07-21 14:46:15,697 INFO L226 Difference]: Without dead ends: 386639 [2020-07-21 14:46:15,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 14:46:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386639 states. [2020-07-21 14:46:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386639 to 193533. [2020-07-21 14:46:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193533 states. [2020-07-21 14:46:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193533 states to 193533 states and 306250 transitions. [2020-07-21 14:46:36,055 INFO L78 Accepts]: Start accepts. Automaton has 193533 states and 306250 transitions. Word has length 488 [2020-07-21 14:46:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:36,055 INFO L479 AbstractCegarLoop]: Abstraction has 193533 states and 306250 transitions. [2020-07-21 14:46:36,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 193533 states and 306250 transitions. [2020-07-21 14:46:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 14:46:36,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:36,212 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] [2020-07-21 14:46:36,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:36,426 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:36,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1943336337, now seen corresponding path program 1 times [2020-07-21 14:46:36,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:36,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888597457] [2020-07-21 14:46:36,428 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:36,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:36,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:36,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888597457] [2020-07-21 14:46:36,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:36,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:36,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948544572] [2020-07-21 14:46:36,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:36,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:36,875 INFO L87 Difference]: Start difference. First operand 193533 states and 306250 transitions. Second operand 3 states. [2020-07-21 14:46:59,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:59,258 INFO L93 Difference]: Finished difference Result 574930 states and 909726 transitions. [2020-07-21 14:46:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:59,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 14:46:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:59,650 INFO L225 Difference]: With dead ends: 574930 [2020-07-21 14:46:59,650 INFO L226 Difference]: Without dead ends: 383729 [2020-07-21 14:47:00,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 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 14:47:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383729 states. [2020-07-21 14:47:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383729 to 383727. [2020-07-21 14:47:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383727 states. [2020-07-21 14:47:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383727 states to 383727 states and 604985 transitions. [2020-07-21 14:47:30,711 INFO L78 Accepts]: Start accepts. Automaton has 383727 states and 604985 transitions. Word has length 489 [2020-07-21 14:47:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:30,711 INFO L479 AbstractCegarLoop]: Abstraction has 383727 states and 604985 transitions. [2020-07-21 14:47:30,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 383727 states and 604985 transitions. [2020-07-21 14:47:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 14:47:31,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:31,066 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] [2020-07-21 14:47:31,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:31,268 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:31,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:31,269 INFO L82 PathProgramCache]: Analyzing trace with hash -5966350, now seen corresponding path program 1 times [2020-07-21 14:47:31,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:31,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55666758] [2020-07-21 14:47:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:32,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:32,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:32,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:32,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55666758] [2020-07-21 14:47:32,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:32,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:32,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276445130] [2020-07-21 14:47:32,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:32,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:32,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:32,498 INFO L87 Difference]: Start difference. First operand 383727 states and 604985 transitions. Second operand 3 states. [2020-07-21 14:48:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:29,680 INFO L93 Difference]: Finished difference Result 1151070 states and 1814781 transitions. [2020-07-21 14:48:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:29,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 14:48:29,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:30,667 INFO L225 Difference]: With dead ends: 1151070 [2020-07-21 14:48:30,668 INFO L226 Difference]: Without dead ends: 767380 [2020-07-21 14:48:31,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 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 14:48:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767380 states. [2020-07-21 14:49:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767380 to 383777. [2020-07-21 14:49:07,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383777 states. [2020-07-21 14:49:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383777 states to 383777 states and 605055 transitions. [2020-07-21 14:49:08,156 INFO L78 Accepts]: Start accepts. Automaton has 383777 states and 605055 transitions. Word has length 489 [2020-07-21 14:49:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:08,157 INFO L479 AbstractCegarLoop]: Abstraction has 383777 states and 605055 transitions. [2020-07-21 14:49:08,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 383777 states and 605055 transitions. [2020-07-21 14:49:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 14:49:08,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:08,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:49:08,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:08,740 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:08,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash 8273172, now seen corresponding path program 1 times [2020-07-21 14:49:08,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:08,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578867809] [2020-07-21 14:49:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:09,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:09,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:09,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:09,232 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 14:49:09,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:09,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578867809] [2020-07-21 14:49:09,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:09,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:09,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857335951] [2020-07-21 14:49:09,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:09,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:09,235 INFO L87 Difference]: Start difference. First operand 383777 states and 605055 transitions. Second operand 3 states. [2020-07-21 14:50:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:07,589 INFO L93 Difference]: Finished difference Result 1150483 states and 1813870 transitions. [2020-07-21 14:50:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:07,589 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 14:50:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:08,561 INFO L225 Difference]: With dead ends: 1150483 [2020-07-21 14:50:08,561 INFO L226 Difference]: Without dead ends: 766732 [2020-07-21 14:50:08,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 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 14:50:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766732 states. [2020-07-21 14:50:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766732 to 383853. [2020-07-21 14:50:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383853 states. [2020-07-21 14:50:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383853 states to 383853 states and 605161 transitions. [2020-07-21 14:50:49,727 INFO L78 Accepts]: Start accepts. Automaton has 383853 states and 605161 transitions. Word has length 490 [2020-07-21 14:50:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:49,728 INFO L479 AbstractCegarLoop]: Abstraction has 383853 states and 605161 transitions. [2020-07-21 14:50:49,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 383853 states and 605161 transitions. [2020-07-21 14:50:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 14:50:50,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:50,090 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] [2020-07-21 14:50:50,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:50,291 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1691033282, now seen corresponding path program 1 times [2020-07-21 14:50:50,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:50,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810042265] [2020-07-21 14:50:50,293 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:50,632 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:50:50,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:50:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:50:50,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:50,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810042265] [2020-07-21 14:50:50,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:50,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:50:50,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363289104] [2020-07-21 14:50:50,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:50:50,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:50,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:50:50,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:50:50,735 INFO L87 Difference]: Start difference. First operand 383853 states and 605161 transitions. Second operand 4 states. [2020-07-21 14:51:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:51:51,903 INFO L93 Difference]: Finished difference Result 1096035 states and 1724567 transitions. [2020-07-21 14:51:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:51:51,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 14:51:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:51:53,237 INFO L225 Difference]: With dead ends: 1096035 [2020-07-21 14:51:53,237 INFO L226 Difference]: Without dead ends: 764177 [2020-07-21 14:51:53,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 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 14:51:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764177 states. [2020-07-21 14:52:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764177 to 445711. [2020-07-21 14:52:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445711 states. [2020-07-21 14:52:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445711 states to 445711 states and 706413 transitions. [2020-07-21 14:52:39,646 INFO L78 Accepts]: Start accepts. Automaton has 445711 states and 706413 transitions. Word has length 491 [2020-07-21 14:52:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:52:39,646 INFO L479 AbstractCegarLoop]: Abstraction has 445711 states and 706413 transitions. [2020-07-21 14:52:39,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:52:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 445711 states and 706413 transitions. [2020-07-21 14:52:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 14:52:40,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:52:40,090 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] [2020-07-21 14:52:40,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:40,290 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:52:40,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:52:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1446046584, now seen corresponding path program 1 times [2020-07-21 14:52:40,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:52:40,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406144211] [2020-07-21 14:52:40,292 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:40,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:52:40,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:52:40,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1659 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:52:40,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:52:41,718 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 14:52:41,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:52:41,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406144211] [2020-07-21 14:52:41,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:52:41,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:52:41,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137506961] [2020-07-21 14:52:41,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:52:41,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:52:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:52:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:52:41,721 INFO L87 Difference]: Start difference. First operand 445711 states and 706413 transitions. Second operand 4 states. [2020-07-21 14:53:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:53:55,306 INFO L93 Difference]: Finished difference Result 1310017 states and 2076474 transitions. [2020-07-21 14:53:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:53:55,307 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 14:53:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:53:56,520 INFO L225 Difference]: With dead ends: 1310017 [2020-07-21 14:53:56,520 INFO L226 Difference]: Without dead ends: 880299 [2020-07-21 14:53:56,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 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 14:53:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880299 states.