/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:24:45,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:24:45,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:24:45,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:24:45,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:24:45,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:24:45,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:24:45,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:24:45,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:24:45,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:24:45,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:24:45,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:24:45,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:24:45,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:24:45,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:24:45,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:24:45,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:24:45,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:24:45,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:24:45,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:24:45,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:24:45,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:24:45,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:24:45,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:24:45,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:24:45,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:24:45,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:24:45,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:24:45,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:24:45,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:24:45,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:24:45,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:24:45,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:24:45,538 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:24:45,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:24:45,538 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:24:45,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:24:45,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:24:45,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:24:45,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:24:45,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:24:45,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:24:45,540 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:24:45,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:24:45,540 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:24:45,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:24:45,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:24:45,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:24:45,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:24:45,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:24:45,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:24:45,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:24:45,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:24:45,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:24:45,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:24:45,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:45,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:24:45,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:24:45,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:24:45,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:24:45,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:24:45,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:24:45,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:24:45,868 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:24:45,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 17:24:45,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1e89cde/e69b3fa60a8e43edb2e5d48ed477755d/FLAG9c0a32192 [2020-07-21 17:24:46,681 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:24:46,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 17:24:46,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1e89cde/e69b3fa60a8e43edb2e5d48ed477755d/FLAG9c0a32192 [2020-07-21 17:24:46,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d1e89cde/e69b3fa60a8e43edb2e5d48ed477755d [2020-07-21 17:24:46,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:24:46,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:24:46,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:24:46,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:24:46,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:24:46,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:46" (1/1) ... [2020-07-21 17:24:46,800 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 05:24:46, skipping insertion in model container [2020-07-21 17:24:46,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:46" (1/1) ... [2020-07-21 17:24:46,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:24:47,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:24:49,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:24:49,301 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:24:51,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:24:51,145 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:24:51,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51 WrapperNode [2020-07-21 17:24:51,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:24:51,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:24:51,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:24:51,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:24:51,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... [2020-07-21 17:24:51,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... [2020-07-21 17:24:51,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... [2020-07-21 17:24:51,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... [2020-07-21 17:24:51,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... [2020-07-21 17:24:51,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... [2020-07-21 17:24:51,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... [2020-07-21 17:24:51,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:24:51,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:24:51,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:24:51,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:24:51,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:24:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:24:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:24:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:24:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:24:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:24:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:24:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:24:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:24:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:24:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:24:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:24:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:24:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:24:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:24:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:24:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:24:51,492 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 17:24:51,492 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:24:51,492 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:24:51,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:24:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:24:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:24:57,173 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:24:57,173 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:24:57,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:57 BoogieIcfgContainer [2020-07-21 17:24:57,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:24:57,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:24:57,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:24:57,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:24:57,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:24:46" (1/3) ... [2020-07-21 17:24:57,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644df977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:57, skipping insertion in model container [2020-07-21 17:24:57,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:51" (2/3) ... [2020-07-21 17:24:57,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644df977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:57, skipping insertion in model container [2020-07-21 17:24:57,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:57" (3/3) ... [2020-07-21 17:24:57,213 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 17:24:57,222 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:24:57,232 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 17:24:57,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 17:24:57,280 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:24:57,280 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:24:57,281 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:24:57,281 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:24:57,281 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:24:57,281 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:24:57,281 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:24:57,281 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:24:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-07-21 17:24:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-21 17:24:57,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:57,379 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] [2020-07-21 17:24:57,380 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-07-21 17:24:57,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:57,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707152017] [2020-07-21 17:24:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:57,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:57,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:57,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:24:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:58,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:58,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707152017] [2020-07-21 17:24:58,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:58,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:24:58,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255682127] [2020-07-21 17:24:58,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:24:58,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:58,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:24:58,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:24:58,183 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 4 states. [2020-07-21 17:24:58,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:58,652 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-07-21 17:24:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:24:58,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 290 [2020-07-21 17:24:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:58,694 INFO L225 Difference]: With dead ends: 3956 [2020-07-21 17:24:58,694 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 17:24:58,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:24:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 17:24:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 17:24:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 17:24:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-07-21 17:24:58,881 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-07-21 17:24:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:58,882 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-07-21 17:24:58,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:24:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-07-21 17:24:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-07-21 17:24:58,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:58,893 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] [2020-07-21 17:24:59,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:59,106 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:59,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:59,107 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-07-21 17:24:59,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:59,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595284156] [2020-07-21 17:24:59,109 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:59,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:59,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:59,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:24:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:24:59,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:59,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595284156] [2020-07-21 17:24:59,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:59,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:24:59,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83199813] [2020-07-21 17:24:59,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:24:59,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:59,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:24:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:24:59,709 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2020-07-21 17:24:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:59,808 INFO L93 Difference]: Finished difference Result 2628 states and 4522 transitions. [2020-07-21 17:24:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:24:59,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2020-07-21 17:24:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:59,823 INFO L225 Difference]: With dead ends: 2628 [2020-07-21 17:24:59,824 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 17:24:59,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:24:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 17:24:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 17:24:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 17:24:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3861 transitions. [2020-07-21 17:24:59,947 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3861 transitions. Word has length 349 [2020-07-21 17:24:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:59,948 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3861 transitions. [2020-07-21 17:24:59,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:24:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3861 transitions. [2020-07-21 17:24:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-21 17:24:59,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:59,959 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] [2020-07-21 17:25:00,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:00,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1236898315, now seen corresponding path program 1 times [2020-07-21 17:25:00,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:00,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414520010] [2020-07-21 17:25:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:00,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 2176 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:00,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:00,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:00,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414520010] [2020-07-21 17:25:00,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:00,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:00,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064231629] [2020-07-21 17:25:00,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:00,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:00,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:00,831 INFO L87 Difference]: Start difference. First operand 2245 states and 3861 transitions. Second operand 3 states. [2020-07-21 17:25:01,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:01,266 INFO L93 Difference]: Finished difference Result 4813 states and 8216 transitions. [2020-07-21 17:25:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:01,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 358 [2020-07-21 17:25:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:01,294 INFO L225 Difference]: With dead ends: 4813 [2020-07-21 17:25:01,294 INFO L226 Difference]: Without dead ends: 3452 [2020-07-21 17:25:01,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2020-07-21 17:25:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 3448. [2020-07-21 17:25:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3448 states. [2020-07-21 17:25:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 5890 transitions. [2020-07-21 17:25:01,497 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 5890 transitions. Word has length 358 [2020-07-21 17:25:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:01,499 INFO L479 AbstractCegarLoop]: Abstraction has 3448 states and 5890 transitions. [2020-07-21 17:25:01,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:01,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 5890 transitions. [2020-07-21 17:25:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-07-21 17:25:01,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:01,522 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] [2020-07-21 17:25:01,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:01,736 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1565722840, now seen corresponding path program 1 times [2020-07-21 17:25:01,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:01,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299843650] [2020-07-21 17:25:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:02,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:02,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:02,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:02,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299843650] [2020-07-21 17:25:02,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:02,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:02,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846769800] [2020-07-21 17:25:02,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:02,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:02,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:02,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:02,480 INFO L87 Difference]: Start difference. First operand 3448 states and 5890 transitions. Second operand 3 states. [2020-07-21 17:25:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:03,050 INFO L93 Difference]: Finished difference Result 6879 states and 11704 transitions. [2020-07-21 17:25:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:03,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 363 [2020-07-21 17:25:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:03,084 INFO L225 Difference]: With dead ends: 6879 [2020-07-21 17:25:03,085 INFO L226 Difference]: Without dead ends: 4564 [2020-07-21 17:25:03,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2020-07-21 17:25:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 4421. [2020-07-21 17:25:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4421 states. [2020-07-21 17:25:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 7535 transitions. [2020-07-21 17:25:03,336 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 7535 transitions. Word has length 363 [2020-07-21 17:25:03,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:03,337 INFO L479 AbstractCegarLoop]: Abstraction has 4421 states and 7535 transitions. [2020-07-21 17:25:03,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:03,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 7535 transitions. [2020-07-21 17:25:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-07-21 17:25:03,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:03,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:03,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:03,580 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2103500535, now seen corresponding path program 1 times [2020-07-21 17:25:03,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:03,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533401558] [2020-07-21 17:25:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:04,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 2184 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:04,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:04,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:04,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533401558] [2020-07-21 17:25:04,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:04,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:04,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471482343] [2020-07-21 17:25:04,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:04,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:04,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:04,205 INFO L87 Difference]: Start difference. First operand 4421 states and 7535 transitions. Second operand 3 states. [2020-07-21 17:25:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:04,617 INFO L93 Difference]: Finished difference Result 10573 states and 17937 transitions. [2020-07-21 17:25:04,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:04,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 364 [2020-07-21 17:25:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:04,656 INFO L225 Difference]: With dead ends: 10573 [2020-07-21 17:25:04,657 INFO L226 Difference]: Without dead ends: 7563 [2020-07-21 17:25:04,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7563 states. [2020-07-21 17:25:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7563 to 7197. [2020-07-21 17:25:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7197 states. [2020-07-21 17:25:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 12218 transitions. [2020-07-21 17:25:04,959 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 12218 transitions. Word has length 364 [2020-07-21 17:25:04,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:04,960 INFO L479 AbstractCegarLoop]: Abstraction has 7197 states and 12218 transitions. [2020-07-21 17:25:04,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 12218 transitions. [2020-07-21 17:25:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-07-21 17:25:04,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:04,982 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] [2020-07-21 17:25:05,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:05,197 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1590181873, now seen corresponding path program 1 times [2020-07-21 17:25:05,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:05,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674397866] [2020-07-21 17:25:05,199 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:05,658 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:05,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:05,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 2185 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:05,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:05,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674397866] [2020-07-21 17:25:05,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:05,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:05,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279557185] [2020-07-21 17:25:05,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:05,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:05,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:05,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:05,870 INFO L87 Difference]: Start difference. First operand 7197 states and 12218 transitions. Second operand 3 states. [2020-07-21 17:25:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:06,549 INFO L93 Difference]: Finished difference Result 18283 states and 30946 transitions. [2020-07-21 17:25:06,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:06,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2020-07-21 17:25:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:06,615 INFO L225 Difference]: With dead ends: 18283 [2020-07-21 17:25:06,616 INFO L226 Difference]: Without dead ends: 12986 [2020-07-21 17:25:06,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12986 states. [2020-07-21 17:25:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12986 to 12602. [2020-07-21 17:25:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12602 states. [2020-07-21 17:25:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12602 states to 12602 states and 21332 transitions. [2020-07-21 17:25:07,136 INFO L78 Accepts]: Start accepts. Automaton has 12602 states and 21332 transitions. Word has length 365 [2020-07-21 17:25:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:07,136 INFO L479 AbstractCegarLoop]: Abstraction has 12602 states and 21332 transitions. [2020-07-21 17:25:07,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 12602 states and 21332 transitions. [2020-07-21 17:25:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-21 17:25:07,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:07,169 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] [2020-07-21 17:25:07,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:07,384 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1442352784, now seen corresponding path program 1 times [2020-07-21 17:25:07,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:07,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405956210] [2020-07-21 17:25:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:08,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:08,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 2185 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:08,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:08,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405956210] [2020-07-21 17:25:08,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:08,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:08,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541210194] [2020-07-21 17:25:08,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:08,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:08,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:08,631 INFO L87 Difference]: Start difference. First operand 12602 states and 21332 transitions. Second operand 3 states. [2020-07-21 17:25:09,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:09,364 INFO L93 Difference]: Finished difference Result 33092 states and 55915 transitions. [2020-07-21 17:25:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:09,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 366 [2020-07-21 17:25:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:09,429 INFO L225 Difference]: With dead ends: 33092 [2020-07-21 17:25:09,430 INFO L226 Difference]: Without dead ends: 23431 [2020-07-21 17:25:09,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23431 states. [2020-07-21 17:25:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23431 to 23012. [2020-07-21 17:25:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23012 states. [2020-07-21 17:25:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23012 states to 23012 states and 38872 transitions. [2020-07-21 17:25:10,520 INFO L78 Accepts]: Start accepts. Automaton has 23012 states and 38872 transitions. Word has length 366 [2020-07-21 17:25:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:10,522 INFO L479 AbstractCegarLoop]: Abstraction has 23012 states and 38872 transitions. [2020-07-21 17:25:10,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23012 states and 38872 transitions. [2020-07-21 17:25:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 17:25:10,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:10,596 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] [2020-07-21 17:25:10,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:10,811 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash 966204662, now seen corresponding path program 1 times [2020-07-21 17:25:10,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:10,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350642191] [2020-07-21 17:25:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:11,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:11,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:11,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:11,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:11,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350642191] [2020-07-21 17:25:11,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:11,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:11,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407207069] [2020-07-21 17:25:11,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:11,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:11,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:11,361 INFO L87 Difference]: Start difference. First operand 23012 states and 38872 transitions. Second operand 3 states. [2020-07-21 17:25:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:12,793 INFO L93 Difference]: Finished difference Result 61275 states and 103386 transitions. [2020-07-21 17:25:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:12,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 367 [2020-07-21 17:25:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:12,895 INFO L225 Difference]: With dead ends: 61275 [2020-07-21 17:25:12,895 INFO L226 Difference]: Without dead ends: 43380 [2020-07-21 17:25:12,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43380 states. [2020-07-21 17:25:15,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43380 to 42892. [2020-07-21 17:25:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42892 states. [2020-07-21 17:25:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42892 states to 42892 states and 72334 transitions. [2020-07-21 17:25:15,235 INFO L78 Accepts]: Start accepts. Automaton has 42892 states and 72334 transitions. Word has length 367 [2020-07-21 17:25:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:15,236 INFO L479 AbstractCegarLoop]: Abstraction has 42892 states and 72334 transitions. [2020-07-21 17:25:15,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42892 states and 72334 transitions. [2020-07-21 17:25:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-21 17:25:15,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:15,301 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] [2020-07-21 17:25:15,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:15,516 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1418558536, now seen corresponding path program 1 times [2020-07-21 17:25:15,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:15,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290847432] [2020-07-21 17:25:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:15,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:25:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:16,046 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 17:25:16,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:16,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290847432] [2020-07-21 17:25:16,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:16,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:16,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858061386] [2020-07-21 17:25:16,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:16,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:16,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:16,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:16,049 INFO L87 Difference]: Start difference. First operand 42892 states and 72334 transitions. Second operand 4 states. [2020-07-21 17:25:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:16,886 INFO L93 Difference]: Finished difference Result 54752 states and 92275 transitions. [2020-07-21 17:25:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:16,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 368 [2020-07-21 17:25:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:16,973 INFO L225 Difference]: With dead ends: 54752 [2020-07-21 17:25:16,973 INFO L226 Difference]: Without dead ends: 37670 [2020-07-21 17:25:17,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37670 states. [2020-07-21 17:25:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37670 to 30761. [2020-07-21 17:25:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30761 states. [2020-07-21 17:25:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30761 states to 30761 states and 51889 transitions. [2020-07-21 17:25:17,721 INFO L78 Accepts]: Start accepts. Automaton has 30761 states and 51889 transitions. Word has length 368 [2020-07-21 17:25:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:17,722 INFO L479 AbstractCegarLoop]: Abstraction has 30761 states and 51889 transitions. [2020-07-21 17:25:17,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand 30761 states and 51889 transitions. [2020-07-21 17:25:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-21 17:25:17,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:17,748 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] [2020-07-21 17:25:17,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:17,962 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:17,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2120446003, now seen corresponding path program 1 times [2020-07-21 17:25:17,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:17,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765169465] [2020-07-21 17:25:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:18,310 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:18,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:18,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:18,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765169465] [2020-07-21 17:25:18,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:18,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:18,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151717949] [2020-07-21 17:25:18,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:18,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:18,443 INFO L87 Difference]: Start difference. First operand 30761 states and 51889 transitions. Second operand 3 states. [2020-07-21 17:25:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:19,972 INFO L93 Difference]: Finished difference Result 61993 states and 104584 transitions. [2020-07-21 17:25:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:19,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 381 [2020-07-21 17:25:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:20,035 INFO L225 Difference]: With dead ends: 61993 [2020-07-21 17:25:20,035 INFO L226 Difference]: Without dead ends: 38976 [2020-07-21 17:25:20,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38976 states. [2020-07-21 17:25:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38976 to 36373. [2020-07-21 17:25:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36373 states. [2020-07-21 17:25:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36373 states to 36373 states and 61362 transitions. [2020-07-21 17:25:21,217 INFO L78 Accepts]: Start accepts. Automaton has 36373 states and 61362 transitions. Word has length 381 [2020-07-21 17:25:21,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:21,217 INFO L479 AbstractCegarLoop]: Abstraction has 36373 states and 61362 transitions. [2020-07-21 17:25:21,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 36373 states and 61362 transitions. [2020-07-21 17:25:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-21 17:25:21,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:21,255 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] [2020-07-21 17:25:21,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:21,469 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash 437382738, now seen corresponding path program 1 times [2020-07-21 17:25:21,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:21,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873276237] [2020-07-21 17:25:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:21,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:21,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:21,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:21,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:21,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873276237] [2020-07-21 17:25:21,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:21,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:21,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738286883] [2020-07-21 17:25:21,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:21,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:21,944 INFO L87 Difference]: Start difference. First operand 36373 states and 61362 transitions. Second operand 3 states. [2020-07-21 17:25:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:24,466 INFO L93 Difference]: Finished difference Result 89757 states and 151241 transitions. [2020-07-21 17:25:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:24,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-07-21 17:25:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:24,532 INFO L225 Difference]: With dead ends: 89757 [2020-07-21 17:25:24,533 INFO L226 Difference]: Without dead ends: 65364 [2020-07-21 17:25:24,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65364 states. [2020-07-21 17:25:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65364 to 63507. [2020-07-21 17:25:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63507 states. [2020-07-21 17:25:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63507 states to 63507 states and 106946 transitions. [2020-07-21 17:25:25,818 INFO L78 Accepts]: Start accepts. Automaton has 63507 states and 106946 transitions. Word has length 382 [2020-07-21 17:25:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:25,818 INFO L479 AbstractCegarLoop]: Abstraction has 63507 states and 106946 transitions. [2020-07-21 17:25:25,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 63507 states and 106946 transitions. [2020-07-21 17:25:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-07-21 17:25:25,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:25,862 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] [2020-07-21 17:25:26,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:26,069 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:26,070 INFO L82 PathProgramCache]: Analyzing trace with hash 859319563, now seen corresponding path program 1 times [2020-07-21 17:25:26,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:26,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373166693] [2020-07-21 17:25:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:26,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:26,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2203 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:26,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:26,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:26,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373166693] [2020-07-21 17:25:26,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:26,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:26,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250507824] [2020-07-21 17:25:26,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:26,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:26,811 INFO L87 Difference]: Start difference. First operand 63507 states and 106946 transitions. Second operand 3 states. [2020-07-21 17:25:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:30,018 INFO L93 Difference]: Finished difference Result 127430 states and 214637 transitions. [2020-07-21 17:25:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:30,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 384 [2020-07-21 17:25:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:30,141 INFO L225 Difference]: With dead ends: 127430 [2020-07-21 17:25:30,142 INFO L226 Difference]: Without dead ends: 83114 [2020-07-21 17:25:30,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83114 states. [2020-07-21 17:25:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83114 to 78971. [2020-07-21 17:25:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78971 states. [2020-07-21 17:25:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78971 states to 78971 states and 133055 transitions. [2020-07-21 17:25:32,568 INFO L78 Accepts]: Start accepts. Automaton has 78971 states and 133055 transitions. Word has length 384 [2020-07-21 17:25:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:32,568 INFO L479 AbstractCegarLoop]: Abstraction has 78971 states and 133055 transitions. [2020-07-21 17:25:32,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 78971 states and 133055 transitions. [2020-07-21 17:25:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-07-21 17:25:32,615 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:32,615 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] [2020-07-21 17:25:32,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:32,816 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:32,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:32,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1706322734, now seen corresponding path program 1 times [2020-07-21 17:25:32,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:32,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88057256] [2020-07-21 17:25:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:33,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:33,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:25:33,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:33,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:33,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88057256] [2020-07-21 17:25:33,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:33,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:33,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082543656] [2020-07-21 17:25:33,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:33,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:33,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:33,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:33,357 INFO L87 Difference]: Start difference. First operand 78971 states and 133055 transitions. Second operand 4 states. [2020-07-21 17:25:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:35,303 INFO L93 Difference]: Finished difference Result 152074 states and 256125 transitions. [2020-07-21 17:25:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:35,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 384 [2020-07-21 17:25:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:35,410 INFO L225 Difference]: With dead ends: 152074 [2020-07-21 17:25:35,411 INFO L226 Difference]: Without dead ends: 73837 [2020-07-21 17:25:35,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73837 states. [2020-07-21 17:25:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73837 to 73837. [2020-07-21 17:25:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73837 states. [2020-07-21 17:25:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73837 states to 73837 states and 124348 transitions. [2020-07-21 17:25:36,946 INFO L78 Accepts]: Start accepts. Automaton has 73837 states and 124348 transitions. Word has length 384 [2020-07-21 17:25:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:36,946 INFO L479 AbstractCegarLoop]: Abstraction has 73837 states and 124348 transitions. [2020-07-21 17:25:36,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 73837 states and 124348 transitions. [2020-07-21 17:25:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-07-21 17:25:36,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:36,992 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] [2020-07-21 17:25:37,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:37,193 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1241716119, now seen corresponding path program 1 times [2020-07-21 17:25:37,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:37,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717494710] [2020-07-21 17:25:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:37,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:37,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:37,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:25:37,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:39,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:39,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717494710] [2020-07-21 17:25:39,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:39,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:39,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315970772] [2020-07-21 17:25:39,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:39,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:39,626 INFO L87 Difference]: Start difference. First operand 73837 states and 124348 transitions. Second operand 4 states. [2020-07-21 17:25:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:40,663 INFO L93 Difference]: Finished difference Result 124200 states and 209092 transitions. [2020-07-21 17:25:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:40,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 398 [2020-07-21 17:25:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:40,768 INFO L225 Difference]: With dead ends: 124200 [2020-07-21 17:25:40,769 INFO L226 Difference]: Without dead ends: 53296 [2020-07-21 17:25:40,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53296 states. [2020-07-21 17:25:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53296 to 51285. [2020-07-21 17:25:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51285 states. [2020-07-21 17:25:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51285 states to 51285 states and 86334 transitions. [2020-07-21 17:25:42,239 INFO L78 Accepts]: Start accepts. Automaton has 51285 states and 86334 transitions. Word has length 398 [2020-07-21 17:25:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:42,241 INFO L479 AbstractCegarLoop]: Abstraction has 51285 states and 86334 transitions. [2020-07-21 17:25:42,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 51285 states and 86334 transitions. [2020-07-21 17:25:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 17:25:42,260 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:42,261 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] [2020-07-21 17:25:42,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:42,468 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:42,469 INFO L82 PathProgramCache]: Analyzing trace with hash -199453310, now seen corresponding path program 1 times [2020-07-21 17:25:42,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:42,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895947234] [2020-07-21 17:25:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:42,839 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:42,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:25:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:42,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:42,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895947234] [2020-07-21 17:25:42,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:42,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:42,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981855894] [2020-07-21 17:25:42,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:42,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:42,941 INFO L87 Difference]: Start difference. First operand 51285 states and 86334 transitions. Second operand 4 states. [2020-07-21 17:25:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:43,839 INFO L93 Difference]: Finished difference Result 85717 states and 144130 transitions. [2020-07-21 17:25:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:43,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 407 [2020-07-21 17:25:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:43,941 INFO L225 Difference]: With dead ends: 85717 [2020-07-21 17:25:43,942 INFO L226 Difference]: Without dead ends: 50255 [2020-07-21 17:25:44,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50255 states. [2020-07-21 17:25:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50255 to 37951. [2020-07-21 17:25:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37951 states. [2020-07-21 17:25:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37951 states to 37951 states and 63689 transitions. [2020-07-21 17:25:45,299 INFO L78 Accepts]: Start accepts. Automaton has 37951 states and 63689 transitions. Word has length 407 [2020-07-21 17:25:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:45,299 INFO L479 AbstractCegarLoop]: Abstraction has 37951 states and 63689 transitions. [2020-07-21 17:25:45,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 37951 states and 63689 transitions. [2020-07-21 17:25:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-07-21 17:25:45,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:45,308 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] [2020-07-21 17:25:45,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:45,520 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 518834070, now seen corresponding path program 1 times [2020-07-21 17:25:45,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:45,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595895623] [2020-07-21 17:25:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:45,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:45,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:45,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:25:45,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:45,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:45,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595895623] [2020-07-21 17:25:45,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:46,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:46,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325766946] [2020-07-21 17:25:46,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:46,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:46,001 INFO L87 Difference]: Start difference. First operand 37951 states and 63689 transitions. Second operand 4 states. [2020-07-21 17:25:47,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:47,087 INFO L93 Difference]: Finished difference Result 72571 states and 121797 transitions. [2020-07-21 17:25:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:47,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 413 [2020-07-21 17:25:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:47,143 INFO L225 Difference]: With dead ends: 72571 [2020-07-21 17:25:47,143 INFO L226 Difference]: Without dead ends: 37741 [2020-07-21 17:25:47,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37741 states. [2020-07-21 17:25:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37741 to 35730. [2020-07-21 17:25:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35730 states. [2020-07-21 17:25:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35730 states to 35730 states and 60010 transitions. [2020-07-21 17:25:47,947 INFO L78 Accepts]: Start accepts. Automaton has 35730 states and 60010 transitions. Word has length 413 [2020-07-21 17:25:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:47,947 INFO L479 AbstractCegarLoop]: Abstraction has 35730 states and 60010 transitions. [2020-07-21 17:25:47,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 35730 states and 60010 transitions. [2020-07-21 17:25:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-07-21 17:25:47,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:47,953 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] [2020-07-21 17:25:48,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:48,154 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:48,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:48,155 INFO L82 PathProgramCache]: Analyzing trace with hash -866449607, now seen corresponding path program 1 times [2020-07-21 17:25:48,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:48,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483695502] [2020-07-21 17:25:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:48,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:25:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:48,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:48,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483695502] [2020-07-21 17:25:48,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:48,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:48,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712403982] [2020-07-21 17:25:48,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:48,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:48,913 INFO L87 Difference]: Start difference. First operand 35730 states and 60010 transitions. Second operand 4 states. [2020-07-21 17:25:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:49,536 INFO L93 Difference]: Finished difference Result 67565 states and 113503 transitions. [2020-07-21 17:25:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:49,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 415 [2020-07-21 17:25:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:49,581 INFO L225 Difference]: With dead ends: 67565 [2020-07-21 17:25:49,582 INFO L226 Difference]: Without dead ends: 35520 [2020-07-21 17:25:49,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35520 states. [2020-07-21 17:25:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35520 to 33509. [2020-07-21 17:25:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33509 states. [2020-07-21 17:25:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33509 states to 33509 states and 56331 transitions. [2020-07-21 17:25:50,326 INFO L78 Accepts]: Start accepts. Automaton has 33509 states and 56331 transitions. Word has length 415 [2020-07-21 17:25:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:50,327 INFO L479 AbstractCegarLoop]: Abstraction has 33509 states and 56331 transitions. [2020-07-21 17:25:50,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 33509 states and 56331 transitions. [2020-07-21 17:25:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-21 17:25:50,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:50,331 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] [2020-07-21 17:25:50,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:50,532 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:50,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1730706966, now seen corresponding path program 1 times [2020-07-21 17:25:50,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:50,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579715829] [2020-07-21 17:25:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:51,032 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:51,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:51,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:51,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579715829] [2020-07-21 17:25:51,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:51,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:51,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135510009] [2020-07-21 17:25:51,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:51,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:51,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:51,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:51,127 INFO L87 Difference]: Start difference. First operand 33509 states and 56331 transitions. Second operand 3 states. [2020-07-21 17:25:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:52,573 INFO L93 Difference]: Finished difference Result 89481 states and 150226 transitions. [2020-07-21 17:25:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:52,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 417 [2020-07-21 17:25:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:52,651 INFO L225 Difference]: With dead ends: 89481 [2020-07-21 17:25:52,651 INFO L226 Difference]: Without dead ends: 56699 [2020-07-21 17:25:52,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56699 states. [2020-07-21 17:25:53,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56699 to 56695. [2020-07-21 17:25:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56695 states. [2020-07-21 17:25:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56695 states to 56695 states and 95010 transitions. [2020-07-21 17:25:53,923 INFO L78 Accepts]: Start accepts. Automaton has 56695 states and 95010 transitions. Word has length 417 [2020-07-21 17:25:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:53,924 INFO L479 AbstractCegarLoop]: Abstraction has 56695 states and 95010 transitions. [2020-07-21 17:25:53,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:53,924 INFO L276 IsEmpty]: Start isEmpty. Operand 56695 states and 95010 transitions. [2020-07-21 17:25:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 17:25:53,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:53,932 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] [2020-07-21 17:25:54,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:54,133 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:54,134 INFO L82 PathProgramCache]: Analyzing trace with hash -964076392, now seen corresponding path program 1 times [2020-07-21 17:25:54,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:54,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741932671] [2020-07-21 17:25:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:54,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:54,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:54,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:54,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741932671] [2020-07-21 17:25:54,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:54,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:54,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143182626] [2020-07-21 17:25:54,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:54,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:54,946 INFO L87 Difference]: Start difference. First operand 56695 states and 95010 transitions. Second operand 3 states. [2020-07-21 17:25:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:56,722 INFO L93 Difference]: Finished difference Result 134057 states and 224458 transitions. [2020-07-21 17:25:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:56,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 431 [2020-07-21 17:25:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:56,851 INFO L225 Difference]: With dead ends: 134057 [2020-07-21 17:25:56,851 INFO L226 Difference]: Without dead ends: 78068 [2020-07-21 17:25:56,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78068 states. [2020-07-21 17:25:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78068 to 78058. [2020-07-21 17:25:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78058 states. [2020-07-21 17:25:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78058 states to 78058 states and 130689 transitions. [2020-07-21 17:25:59,136 INFO L78 Accepts]: Start accepts. Automaton has 78058 states and 130689 transitions. Word has length 431 [2020-07-21 17:25:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:59,137 INFO L479 AbstractCegarLoop]: Abstraction has 78058 states and 130689 transitions. [2020-07-21 17:25:59,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 78058 states and 130689 transitions. [2020-07-21 17:25:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 17:25:59,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:59,147 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] [2020-07-21 17:25:59,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:59,348 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1837564182, now seen corresponding path program 1 times [2020-07-21 17:25:59,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:59,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302125535] [2020-07-21 17:25:59,349 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 17:25:59,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:59,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:59,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 2979 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:59,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:25:59,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:59,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302125535] [2020-07-21 17:25:59,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:59,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:59,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805116718] [2020-07-21 17:25:59,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:59,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:59,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:59,946 INFO L87 Difference]: Start difference. First operand 78058 states and 130689 transitions. Second operand 3 states. [2020-07-21 17:26:02,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:02,403 INFO L93 Difference]: Finished difference Result 170582 states and 285357 transitions. [2020-07-21 17:26:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:02,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 431 [2020-07-21 17:26:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:02,550 INFO L225 Difference]: With dead ends: 170582 [2020-07-21 17:26:02,550 INFO L226 Difference]: Without dead ends: 93251 [2020-07-21 17:26:02,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93251 states. [2020-07-21 17:26:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93251 to 92581. [2020-07-21 17:26:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92581 states. [2020-07-21 17:26:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92581 states to 92581 states and 154742 transitions. [2020-07-21 17:26:05,266 INFO L78 Accepts]: Start accepts. Automaton has 92581 states and 154742 transitions. Word has length 431 [2020-07-21 17:26:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:05,266 INFO L479 AbstractCegarLoop]: Abstraction has 92581 states and 154742 transitions. [2020-07-21 17:26:05,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 92581 states and 154742 transitions. [2020-07-21 17:26:05,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 17:26:05,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:05,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:05,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:05,476 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:05,477 INFO L82 PathProgramCache]: Analyzing trace with hash 855381512, now seen corresponding path program 1 times [2020-07-21 17:26:05,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:05,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507726385] [2020-07-21 17:26:05,478 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 17:26:05,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:05,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:08,718 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 17:26:08,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:08,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507726385] [2020-07-21 17:26:08,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:08,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:08,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354657032] [2020-07-21 17:26:08,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:08,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:08,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:08,720 INFO L87 Difference]: Start difference. First operand 92581 states and 154742 transitions. Second operand 3 states. [2020-07-21 17:26:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:11,671 INFO L93 Difference]: Finished difference Result 217413 states and 362614 transitions. [2020-07-21 17:26:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:11,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 435 [2020-07-21 17:26:11,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:11,857 INFO L225 Difference]: With dead ends: 217413 [2020-07-21 17:26:11,857 INFO L226 Difference]: Without dead ends: 125515 [2020-07-21 17:26:11,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125515 states. [2020-07-21 17:26:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125515 to 125511. [2020-07-21 17:26:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125511 states. [2020-07-21 17:26:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125511 states to 125511 states and 208872 transitions. [2020-07-21 17:26:15,223 INFO L78 Accepts]: Start accepts. Automaton has 125511 states and 208872 transitions. Word has length 435 [2020-07-21 17:26:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:15,224 INFO L479 AbstractCegarLoop]: Abstraction has 125511 states and 208872 transitions. [2020-07-21 17:26:15,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 125511 states and 208872 transitions. [2020-07-21 17:26:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-07-21 17:26:15,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:15,237 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] [2020-07-21 17:26:15,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:15,438 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash 181076862, now seen corresponding path program 1 times [2020-07-21 17:26:15,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:15,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067468410] [2020-07-21 17:26:15,440 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 17:26:15,963 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:15,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:18,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:18,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067468410] [2020-07-21 17:26:18,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:18,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:18,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563540388] [2020-07-21 17:26:18,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:18,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:18,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:18,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:18,366 INFO L87 Difference]: Start difference. First operand 125511 states and 208872 transitions. Second operand 3 states. [2020-07-21 17:26:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:22,614 INFO L93 Difference]: Finished difference Result 310557 states and 515393 transitions. [2020-07-21 17:26:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:23,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 439 [2020-07-21 17:26:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:23,271 INFO L225 Difference]: With dead ends: 310557 [2020-07-21 17:26:23,271 INFO L226 Difference]: Without dead ends: 185930 [2020-07-21 17:26:23,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185930 states. [2020-07-21 17:26:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185930 to 185926. [2020-07-21 17:26:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185926 states. [2020-07-21 17:26:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185926 states to 185926 states and 307637 transitions. [2020-07-21 17:26:32,478 INFO L78 Accepts]: Start accepts. Automaton has 185926 states and 307637 transitions. Word has length 439 [2020-07-21 17:26:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:32,478 INFO L479 AbstractCegarLoop]: Abstraction has 185926 states and 307637 transitions. [2020-07-21 17:26:32,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 185926 states and 307637 transitions. [2020-07-21 17:26:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-07-21 17:26:32,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:32,498 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] [2020-07-21 17:26:32,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:32,712 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1390794656, now seen corresponding path program 1 times [2020-07-21 17:26:32,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:32,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277014853] [2020-07-21 17:26:32,714 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 17:26:33,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:33,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:33,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 3006 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:33,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:33,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:33,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277014853] [2020-07-21 17:26:33,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:33,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:33,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646280201] [2020-07-21 17:26:33,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:33,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:33,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:33,365 INFO L87 Difference]: Start difference. First operand 185926 states and 307637 transitions. Second operand 3 states. [2020-07-21 17:26:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:44,917 INFO L93 Difference]: Finished difference Result 463552 states and 764553 transitions. [2020-07-21 17:26:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:44,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 443 [2020-07-21 17:26:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:45,358 INFO L225 Difference]: With dead ends: 463552 [2020-07-21 17:26:45,358 INFO L226 Difference]: Without dead ends: 278912 [2020-07-21 17:26:45,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278912 states. [2020-07-21 17:26:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278912 to 278908. [2020-07-21 17:26:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278908 states. [2020-07-21 17:26:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278908 states to 278908 states and 458397 transitions. [2020-07-21 17:26:54,522 INFO L78 Accepts]: Start accepts. Automaton has 278908 states and 458397 transitions. Word has length 443 [2020-07-21 17:26:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:54,522 INFO L479 AbstractCegarLoop]: Abstraction has 278908 states and 458397 transitions. [2020-07-21 17:26:54,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 278908 states and 458397 transitions. [2020-07-21 17:26:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-21 17:26:54,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:54,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:54,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:54,757 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:54,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash -735112730, now seen corresponding path program 1 times [2020-07-21 17:26:54,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:54,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493629277] [2020-07-21 17:26:54,759 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 17:26:55,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:55,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 3015 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:55,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:55,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:55,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493629277] [2020-07-21 17:26:55,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:55,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:55,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497281802] [2020-07-21 17:26:55,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:55,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:55,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:55,359 INFO L87 Difference]: Start difference. First operand 278908 states and 458397 transitions. Second operand 3 states. [2020-07-21 17:27:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:11,144 INFO L93 Difference]: Finished difference Result 702782 states and 1150809 transitions. [2020-07-21 17:27:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:11,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 447 [2020-07-21 17:27:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:12,498 INFO L225 Difference]: With dead ends: 702782 [2020-07-21 17:27:12,499 INFO L226 Difference]: Without dead ends: 425964 [2020-07-21 17:27:12,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425964 states. [2020-07-21 17:27:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425964 to 424832. [2020-07-21 17:27:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424832 states. [2020-07-21 17:27:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424832 states to 424832 states and 692982 transitions. [2020-07-21 17:27:38,564 INFO L78 Accepts]: Start accepts. Automaton has 424832 states and 692982 transitions. Word has length 447 [2020-07-21 17:27:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:38,564 INFO L479 AbstractCegarLoop]: Abstraction has 424832 states and 692982 transitions. [2020-07-21 17:27:38,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 424832 states and 692982 transitions. [2020-07-21 17:27:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-07-21 17:27:38,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:38,635 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] [2020-07-21 17:27:38,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:38,836 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash -831926984, now seen corresponding path program 1 times [2020-07-21 17:27:38,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:38,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626585223] [2020-07-21 17:27:38,838 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:39,216 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:39,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:39,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:39,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:40,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:40,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626585223] [2020-07-21 17:27:40,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:40,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:40,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477416560] [2020-07-21 17:27:40,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:40,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:40,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:40,058 INFO L87 Difference]: Start difference. First operand 424832 states and 692982 transitions. Second operand 3 states. [2020-07-21 17:28:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:05,494 INFO L93 Difference]: Finished difference Result 892110 states and 1458641 transitions. [2020-07-21 17:28:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:05,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 451 [2020-07-21 17:28:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:06,416 INFO L225 Difference]: With dead ends: 892110 [2020-07-21 17:28:06,416 INFO L226 Difference]: Without dead ends: 614112 [2020-07-21 17:28:06,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614112 states. [2020-07-21 17:28:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614112 to 613638. [2020-07-21 17:28:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613638 states. [2020-07-21 17:28:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613638 states to 613638 states and 998989 transitions. [2020-07-21 17:28:39,763 INFO L78 Accepts]: Start accepts. Automaton has 613638 states and 998989 transitions. Word has length 451 [2020-07-21 17:28:39,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:39,764 INFO L479 AbstractCegarLoop]: Abstraction has 613638 states and 998989 transitions. [2020-07-21 17:28:39,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 613638 states and 998989 transitions. [2020-07-21 17:28:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-07-21 17:28:39,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:39,845 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] [2020-07-21 17:28:40,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:40,046 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:40,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:40,047 INFO L82 PathProgramCache]: Analyzing trace with hash 805633825, now seen corresponding path program 1 times [2020-07-21 17:28:40,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:40,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368805929] [2020-07-21 17:28:40,049 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:40,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:40,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 17:28:40,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:40,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:40,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368805929] [2020-07-21 17:28:40,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:40,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 17:28:40,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887733471] [2020-07-21 17:28:40,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 17:28:40,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:40,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 17:28:40,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:28:40,960 INFO L87 Difference]: Start difference. First operand 613638 states and 998989 transitions. Second operand 7 states. [2020-07-21 17:30:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:26,479 INFO L93 Difference]: Finished difference Result 2717742 states and 4441122 transitions. [2020-07-21 17:30:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 17:30:26,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 455 [2020-07-21 17:30:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:30,597 INFO L225 Difference]: With dead ends: 2717742 [2020-07-21 17:30:30,598 INFO L226 Difference]: Without dead ends: 2350531 [2020-07-21 17:30:31,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:30:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350531 states. [2020-07-21 17:32:02,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350531 to 990587. [2020-07-21 17:32:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990587 states.