/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:32:18,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:32:18,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:32:18,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:32:18,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:32:18,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:32:18,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:32:18,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:32:18,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:32:18,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:32:18,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:32:18,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:32:18,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:32:18,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:32:18,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:32:18,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:32:18,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:32:18,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:32:18,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:32:18,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:32:18,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:32:18,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:32:18,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:32:18,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:32:18,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:32:18,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:32:18,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:32:18,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:32:18,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:32:18,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:32:18,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:32:18,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:32:18,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:32:18,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:32:18,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:32:18,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:32:18,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:32:18,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:32:18,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:32:18,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:32:18,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:32:18,554 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 17:32:18,569 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:32:18,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:32:18,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:32:18,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:32:18,571 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:32:18,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:32:18,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:32:18,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:32:18,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:32:18,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:32:18,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:32:18,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:32:18,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:32:18,572 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:32:18,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:32:18,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:32:18,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:32:18,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:32:18,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:32:18,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:32:18,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:32:18,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:32:18,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:32:18,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:32:18,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:32:18,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:32:18,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:18,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:32:18,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:32:18,575 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 17:32:18,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:32:18,872 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:32:18,876 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:32:18,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:32:18,878 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:32:18,879 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:32:18,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1456a3e07/b8ebff1e5bed4f019cac380a22de1fc4/FLAGc4c182ff3 [2020-07-21 17:32:19,580 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:32:19,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:32:19,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1456a3e07/b8ebff1e5bed4f019cac380a22de1fc4/FLAGc4c182ff3 [2020-07-21 17:32:19,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1456a3e07/b8ebff1e5bed4f019cac380a22de1fc4 [2020-07-21 17:32:19,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:32:19,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:32:19,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:32:19,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:32:19,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:32:19,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:32:19" (1/1) ... [2020-07-21 17:32:19,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d0c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:19, skipping insertion in model container [2020-07-21 17:32:19,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:32:19" (1/1) ... [2020-07-21 17:32:19,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:32:19,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:32:21,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:32:21,435 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:32:22,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:32:22,823 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:32:22,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22 WrapperNode [2020-07-21 17:32:22,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:32:22,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:32:22,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:32:22,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:32:22,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (1/1) ... [2020-07-21 17:32:22,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (1/1) ... [2020-07-21 17:32:22,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (1/1) ... [2020-07-21 17:32:22,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (1/1) ... [2020-07-21 17:32:22,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (1/1) ... [2020-07-21 17:32:23,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (1/1) ... [2020-07-21 17:32:23,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (1/1) ... [2020-07-21 17:32:23,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:32:23,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:32:23,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:32:23,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:32:23,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (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 17:32:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:32:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:32:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:32:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:32:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:32:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:32:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 17:32:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:32:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:32:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:32:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:32:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:32:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:32:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:32:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:32:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:32:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:32:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:32:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:32:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:32:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:32:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:32:26,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:32:26,222 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:32:26,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:32:26 BoogieIcfgContainer [2020-07-21 17:32:26,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:32:26,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:32:26,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:32:26,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:32:26,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:32:19" (1/3) ... [2020-07-21 17:32:26,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce16b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:32:26, skipping insertion in model container [2020-07-21 17:32:26,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:32:22" (2/3) ... [2020-07-21 17:32:26,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce16b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:32:26, skipping insertion in model container [2020-07-21 17:32:26,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:32:26" (3/3) ... [2020-07-21 17:32:26,246 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 17:32:26,257 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:32:26,272 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations. [2020-07-21 17:32:26,288 INFO L251 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2020-07-21 17:32:26,324 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:32:26,324 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:32:26,324 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:32:26,325 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:32:26,325 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:32:26,325 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:32:26,325 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:32:26,325 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:32:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states. [2020-07-21 17:32:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 17:32:26,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:26,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:26,480 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash -537993708, now seen corresponding path program 1 times [2020-07-21 17:32:26,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:26,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778442039] [2020-07-21 17:32:26,504 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 17:32:27,028 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:27,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:32:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:27,311 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 17:32:27,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:27,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778442039] [2020-07-21 17:32:27,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:27,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:27,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374399043] [2020-07-21 17:32:27,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:27,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:27,337 INFO L87 Difference]: Start difference. First operand 1027 states. Second operand 3 states. [2020-07-21 17:32:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:27,615 INFO L93 Difference]: Finished difference Result 1794 states and 3183 transitions. [2020-07-21 17:32:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:27,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 17:32:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:27,645 INFO L225 Difference]: With dead ends: 1794 [2020-07-21 17:32:27,645 INFO L226 Difference]: Without dead ends: 1483 [2020-07-21 17:32:27,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2020-07-21 17:32:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1481. [2020-07-21 17:32:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2020-07-21 17:32:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2263 transitions. [2020-07-21 17:32:27,809 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2263 transitions. Word has length 327 [2020-07-21 17:32:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:27,810 INFO L479 AbstractCegarLoop]: Abstraction has 1481 states and 2263 transitions. [2020-07-21 17:32:27,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2263 transitions. [2020-07-21 17:32:27,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 17:32:27,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:27,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:28,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:28,043 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 297127498, now seen corresponding path program 1 times [2020-07-21 17:32:28,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:28,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217124765] [2020-07-21 17:32:28,046 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 17:32:28,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:28,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:28,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:32:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:28,615 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 17:32:28,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:28,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217124765] [2020-07-21 17:32:28,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:28,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:28,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242007664] [2020-07-21 17:32:28,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:28,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:28,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:28,622 INFO L87 Difference]: Start difference. First operand 1481 states and 2263 transitions. Second operand 3 states. [2020-07-21 17:32:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:28,999 INFO L93 Difference]: Finished difference Result 2870 states and 4443 transitions. [2020-07-21 17:32:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:29,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 17:32:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:29,016 INFO L225 Difference]: With dead ends: 2870 [2020-07-21 17:32:29,017 INFO L226 Difference]: Without dead ends: 2499 [2020-07-21 17:32:29,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2020-07-21 17:32:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2497. [2020-07-21 17:32:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2497 states. [2020-07-21 17:32:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 3841 transitions. [2020-07-21 17:32:29,120 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 3841 transitions. Word has length 327 [2020-07-21 17:32:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:29,122 INFO L479 AbstractCegarLoop]: Abstraction has 2497 states and 3841 transitions. [2020-07-21 17:32:29,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 3841 transitions. [2020-07-21 17:32:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 17:32:29,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:29,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:29,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:29,350 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:29,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:29,351 INFO L82 PathProgramCache]: Analyzing trace with hash 296788874, now seen corresponding path program 1 times [2020-07-21 17:32:29,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:29,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184379456] [2020-07-21 17:32:29,353 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 17:32:29,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:29,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:32:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:29,811 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 17:32:29,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:29,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184379456] [2020-07-21 17:32:29,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:29,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:29,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793242662] [2020-07-21 17:32:29,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:29,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:29,815 INFO L87 Difference]: Start difference. First operand 2497 states and 3841 transitions. Second operand 3 states. [2020-07-21 17:32:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:30,124 INFO L93 Difference]: Finished difference Result 5134 states and 8002 transitions. [2020-07-21 17:32:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:30,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 17:32:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:30,146 INFO L225 Difference]: With dead ends: 5134 [2020-07-21 17:32:30,146 INFO L226 Difference]: Without dead ends: 4361 [2020-07-21 17:32:30,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2020-07-21 17:32:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 4359. [2020-07-21 17:32:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4359 states. [2020-07-21 17:32:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6733 transitions. [2020-07-21 17:32:30,318 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6733 transitions. Word has length 327 [2020-07-21 17:32:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:30,319 INFO L479 AbstractCegarLoop]: Abstraction has 4359 states and 6733 transitions. [2020-07-21 17:32:30,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6733 transitions. [2020-07-21 17:32:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 17:32:30,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:30,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:30,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:30,552 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash -586798209, now seen corresponding path program 1 times [2020-07-21 17:32:30,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:30,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202439454] [2020-07-21 17:32:30,554 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 17:32:30,990 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:32:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:31,233 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 17:32:31,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:31,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202439454] [2020-07-21 17:32:31,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:31,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:32:31,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522311059] [2020-07-21 17:32:31,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:32:31,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:31,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:32:31,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:32:31,237 INFO L87 Difference]: Start difference. First operand 4359 states and 6733 transitions. Second operand 4 states. [2020-07-21 17:32:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:31,684 INFO L93 Difference]: Finished difference Result 12898 states and 19904 transitions. [2020-07-21 17:32:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:32:31,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-07-21 17:32:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:31,730 INFO L225 Difference]: With dead ends: 12898 [2020-07-21 17:32:31,731 INFO L226 Difference]: Without dead ends: 8554 [2020-07-21 17:32:31,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:32:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8554 states. [2020-07-21 17:32:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8554 to 8347. [2020-07-21 17:32:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8347 states. [2020-07-21 17:32:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 12864 transitions. [2020-07-21 17:32:32,196 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 12864 transitions. Word has length 327 [2020-07-21 17:32:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:32,196 INFO L479 AbstractCegarLoop]: Abstraction has 8347 states and 12864 transitions. [2020-07-21 17:32:32,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:32:32,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 12864 transitions. [2020-07-21 17:32:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 17:32:32,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:32,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:32,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:32,430 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:32,430 INFO L82 PathProgramCache]: Analyzing trace with hash 318218777, now seen corresponding path program 1 times [2020-07-21 17:32:32,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:32,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122198198] [2020-07-21 17:32:32,431 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 17:32:32,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:32,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 2211 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:32,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:32:32,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:32,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122198198] [2020-07-21 17:32:32,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:32,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:32,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112525939] [2020-07-21 17:32:32,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:32,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:32,959 INFO L87 Difference]: Start difference. First operand 8347 states and 12864 transitions. Second operand 3 states. [2020-07-21 17:32:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:33,598 INFO L93 Difference]: Finished difference Result 24596 states and 37840 transitions. [2020-07-21 17:32:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:33,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 17:32:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:33,719 INFO L225 Difference]: With dead ends: 24596 [2020-07-21 17:32:33,719 INFO L226 Difference]: Without dead ends: 16378 [2020-07-21 17:32:33,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2020-07-21 17:32:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 16171. [2020-07-21 17:32:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16171 states. [2020-07-21 17:32:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 24823 transitions. [2020-07-21 17:32:34,820 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 24823 transitions. Word has length 329 [2020-07-21 17:32:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:34,821 INFO L479 AbstractCegarLoop]: Abstraction has 16171 states and 24823 transitions. [2020-07-21 17:32:34,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 24823 transitions. [2020-07-21 17:32:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 17:32:34,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:34,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:35,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:35,087 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1871319948, now seen corresponding path program 1 times [2020-07-21 17:32:35,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:35,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374592726] [2020-07-21 17:32:35,089 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 17:32:35,625 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:35,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:35,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:36,563 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 17:32:36,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:36,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374592726] [2020-07-21 17:32:36,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:36,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:36,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040629274] [2020-07-21 17:32:36,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:36,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:36,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:36,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:36,575 INFO L87 Difference]: Start difference. First operand 16171 states and 24823 transitions. Second operand 3 states. [2020-07-21 17:32:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:37,385 INFO L93 Difference]: Finished difference Result 48436 states and 74339 transitions. [2020-07-21 17:32:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:37,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 17:32:37,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:37,462 INFO L225 Difference]: With dead ends: 48436 [2020-07-21 17:32:37,462 INFO L226 Difference]: Without dead ends: 32304 [2020-07-21 17:32:37,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32304 states. [2020-07-21 17:32:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32304 to 16185. [2020-07-21 17:32:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16185 states. [2020-07-21 17:32:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16185 states to 16185 states and 24840 transitions. [2020-07-21 17:32:38,418 INFO L78 Accepts]: Start accepts. Automaton has 16185 states and 24840 transitions. Word has length 329 [2020-07-21 17:32:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:38,419 INFO L479 AbstractCegarLoop]: Abstraction has 16185 states and 24840 transitions. [2020-07-21 17:32:38,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 16185 states and 24840 transitions. [2020-07-21 17:32:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:32:38,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:38,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:38,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:38,666 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2087009915, now seen corresponding path program 1 times [2020-07-21 17:32:38,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:38,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435945017] [2020-07-21 17:32:38,668 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 17:32:39,114 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:39,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1943 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:39,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:39,231 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 17:32:39,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:39,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435945017] [2020-07-21 17:32:39,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:39,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:39,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874588654] [2020-07-21 17:32:39,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:39,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:39,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:39,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:39,235 INFO L87 Difference]: Start difference. First operand 16185 states and 24840 transitions. Second operand 3 states. [2020-07-21 17:32:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:40,168 INFO L93 Difference]: Finished difference Result 48458 states and 74369 transitions. [2020-07-21 17:32:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:40,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:32:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:40,237 INFO L225 Difference]: With dead ends: 48458 [2020-07-21 17:32:40,237 INFO L226 Difference]: Without dead ends: 32327 [2020-07-21 17:32:40,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32327 states. [2020-07-21 17:32:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32327 to 16208. [2020-07-21 17:32:40,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16208 states. [2020-07-21 17:32:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16208 states to 16208 states and 24872 transitions. [2020-07-21 17:32:40,906 INFO L78 Accepts]: Start accepts. Automaton has 16208 states and 24872 transitions. Word has length 330 [2020-07-21 17:32:40,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:40,907 INFO L479 AbstractCegarLoop]: Abstraction has 16208 states and 24872 transitions. [2020-07-21 17:32:40,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 16208 states and 24872 transitions. [2020-07-21 17:32:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 17:32:40,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:40,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:41,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:41,155 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:41,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1372001314, now seen corresponding path program 1 times [2020-07-21 17:32:41,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:41,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007847603] [2020-07-21 17:32:41,156 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 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 17:32:41,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:41,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:32:41,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:41,569 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 17:32:41,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:41,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007847603] [2020-07-21 17:32:41,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:41,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:32:41,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391676537] [2020-07-21 17:32:41,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:32:41,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:32:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:32:41,574 INFO L87 Difference]: Start difference. First operand 16208 states and 24872 transitions. Second operand 4 states. [2020-07-21 17:32:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:42,334 INFO L93 Difference]: Finished difference Result 33282 states and 51016 transitions. [2020-07-21 17:32:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:32:42,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-21 17:32:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:42,367 INFO L225 Difference]: With dead ends: 33282 [2020-07-21 17:32:42,367 INFO L226 Difference]: Without dead ends: 16866 [2020-07-21 17:32:42,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:32:42,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16866 states. [2020-07-21 17:32:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16866 to 16659. [2020-07-21 17:32:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16659 states. [2020-07-21 17:32:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16659 states to 16659 states and 25460 transitions. [2020-07-21 17:32:42,928 INFO L78 Accepts]: Start accepts. Automaton has 16659 states and 25460 transitions. Word has length 331 [2020-07-21 17:32:42,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:42,928 INFO L479 AbstractCegarLoop]: Abstraction has 16659 states and 25460 transitions. [2020-07-21 17:32:42,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:32:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16659 states and 25460 transitions. [2020-07-21 17:32:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:32:42,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:42,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:43,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:43,171 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:43,171 INFO L82 PathProgramCache]: Analyzing trace with hash -770430392, now seen corresponding path program 1 times [2020-07-21 17:32:43,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:43,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113526283] [2020-07-21 17:32:43,173 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 17:32:43,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:43,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:43,577 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 17:32:43,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:43,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113526283] [2020-07-21 17:32:43,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:43,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:43,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056795047] [2020-07-21 17:32:43,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:43,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:43,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:43,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:43,580 INFO L87 Difference]: Start difference. First operand 16659 states and 25460 transitions. Second operand 3 states. [2020-07-21 17:32:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:44,377 INFO L93 Difference]: Finished difference Result 49397 states and 75401 transitions. [2020-07-21 17:32:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:44,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 17:32:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:44,459 INFO L225 Difference]: With dead ends: 49397 [2020-07-21 17:32:44,459 INFO L226 Difference]: Without dead ends: 33037 [2020-07-21 17:32:44,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:44,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33037 states. [2020-07-21 17:32:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33037 to 16689. [2020-07-21 17:32:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16689 states. [2020-07-21 17:32:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16689 states to 16689 states and 25495 transitions. [2020-07-21 17:32:45,226 INFO L78 Accepts]: Start accepts. Automaton has 16689 states and 25495 transitions. Word has length 333 [2020-07-21 17:32:45,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:45,227 INFO L479 AbstractCegarLoop]: Abstraction has 16689 states and 25495 transitions. [2020-07-21 17:32:45,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:45,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16689 states and 25495 transitions. [2020-07-21 17:32:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:32:45,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:45,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:45,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:45,994 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:45,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1927314311, now seen corresponding path program 1 times [2020-07-21 17:32:45,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:45,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965632679] [2020-07-21 17:32:45,996 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 17:32:46,329 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1952 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:32:46,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:46,409 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 17:32:46,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:46,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965632679] [2020-07-21 17:32:46,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:46,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:32:46,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343484692] [2020-07-21 17:32:46,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:32:46,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:32:46,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:32:46,411 INFO L87 Difference]: Start difference. First operand 16689 states and 25495 transitions. Second operand 4 states. [2020-07-21 17:32:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:47,596 INFO L93 Difference]: Finished difference Result 49409 states and 75393 transitions. [2020-07-21 17:32:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:32:47,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-21 17:32:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:47,646 INFO L225 Difference]: With dead ends: 49409 [2020-07-21 17:32:47,647 INFO L226 Difference]: Without dead ends: 33205 [2020-07-21 17:32:47,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 330 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 17:32:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33205 states. [2020-07-21 17:32:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33205 to 17061. [2020-07-21 17:32:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17061 states. [2020-07-21 17:32:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17061 states to 17061 states and 26111 transitions. [2020-07-21 17:32:48,458 INFO L78 Accepts]: Start accepts. Automaton has 17061 states and 26111 transitions. Word has length 333 [2020-07-21 17:32:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:48,458 INFO L479 AbstractCegarLoop]: Abstraction has 17061 states and 26111 transitions. [2020-07-21 17:32:48,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:32:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 17061 states and 26111 transitions. [2020-07-21 17:32:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:32:48,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:48,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:48,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:48,685 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:48,686 INFO L82 PathProgramCache]: Analyzing trace with hash -204943170, now seen corresponding path program 1 times [2020-07-21 17:32:48,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:48,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367987780] [2020-07-21 17:32:48,687 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 17:32:49,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:32:49,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:49,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 2218 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:32:49,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:49,169 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 17:32:49,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:49,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367987780] [2020-07-21 17:32:49,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:49,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:32:49,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082492296] [2020-07-21 17:32:49,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:32:49,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:32:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:49,171 INFO L87 Difference]: Start difference. First operand 17061 states and 26111 transitions. Second operand 3 states. [2020-07-21 17:32:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:50,225 INFO L93 Difference]: Finished difference Result 49163 states and 74964 transitions. [2020-07-21 17:32:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:50,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 17:32:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:50,264 INFO L225 Difference]: With dead ends: 49163 [2020-07-21 17:32:50,264 INFO L226 Difference]: Without dead ends: 32885 [2020-07-21 17:32:50,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32885 states. [2020-07-21 17:32:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32885 to 32678. [2020-07-21 17:32:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32678 states. [2020-07-21 17:32:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32678 states to 32678 states and 49662 transitions. [2020-07-21 17:32:51,205 INFO L78 Accepts]: Start accepts. Automaton has 32678 states and 49662 transitions. Word has length 333 [2020-07-21 17:32:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:32:51,205 INFO L479 AbstractCegarLoop]: Abstraction has 32678 states and 49662 transitions. [2020-07-21 17:32:51,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:32:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 32678 states and 49662 transitions. [2020-07-21 17:32:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:32:51,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:32:51,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:32:51,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:32:51,447 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:32:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:32:51,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1238335886, now seen corresponding path program 1 times [2020-07-21 17:32:51,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:32:51,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430524833] [2020-07-21 17:32:51,449 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 17:32:51,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:32:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:32:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:32:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:32:52,147 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 17:32:52,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:32:52,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430524833] [2020-07-21 17:32:52,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:32:52,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:32:52,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215147178] [2020-07-21 17:32:52,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:32:52,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:32:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:32:52,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:32:52,154 INFO L87 Difference]: Start difference. First operand 32678 states and 49662 transitions. Second operand 9 states. [2020-07-21 17:33:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:07,847 INFO L93 Difference]: Finished difference Result 260711 states and 404359 transitions. [2020-07-21 17:33:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:33:07,848 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 333 [2020-07-21 17:33:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:08,163 INFO L225 Difference]: With dead ends: 260711 [2020-07-21 17:33:08,163 INFO L226 Difference]: Without dead ends: 249932 [2020-07-21 17:33:08,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:33:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249932 states. [2020-07-21 17:33:15,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249932 to 93828. [2020-07-21 17:33:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93828 states. [2020-07-21 17:33:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93828 states to 93828 states and 143764 transitions. [2020-07-21 17:33:15,265 INFO L78 Accepts]: Start accepts. Automaton has 93828 states and 143764 transitions. Word has length 333 [2020-07-21 17:33:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:15,266 INFO L479 AbstractCegarLoop]: Abstraction has 93828 states and 143764 transitions. [2020-07-21 17:33:15,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:33:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 93828 states and 143764 transitions. [2020-07-21 17:33:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:33:15,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:15,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:15,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:15,544 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1744164455, now seen corresponding path program 1 times [2020-07-21 17:33:15,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:15,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122224964] [2020-07-21 17:33:15,546 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 17:33:15,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 2223 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:15,994 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 17:33:15,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:15,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122224964] [2020-07-21 17:33:15,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:15,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:15,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129328393] [2020-07-21 17:33:15,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:15,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:15,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:15,996 INFO L87 Difference]: Start difference. First operand 93828 states and 143764 transitions. Second operand 3 states. [2020-07-21 17:33:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:23,149 INFO L93 Difference]: Finished difference Result 237245 states and 365302 transitions. [2020-07-21 17:33:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:23,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 17:33:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:23,379 INFO L225 Difference]: With dead ends: 237245 [2020-07-21 17:33:23,379 INFO L226 Difference]: Without dead ends: 146004 [2020-07-21 17:33:23,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146004 states. [2020-07-21 17:33:31,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146004 to 116786. [2020-07-21 17:33:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116786 states. [2020-07-21 17:33:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116786 states to 116786 states and 180972 transitions. [2020-07-21 17:33:31,353 INFO L78 Accepts]: Start accepts. Automaton has 116786 states and 180972 transitions. Word has length 333 [2020-07-21 17:33:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:31,353 INFO L479 AbstractCegarLoop]: Abstraction has 116786 states and 180972 transitions. [2020-07-21 17:33:31,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 116786 states and 180972 transitions. [2020-07-21 17:33:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:33:31,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:31,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:31,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:31,613 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:31,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1655619516, now seen corresponding path program 1 times [2020-07-21 17:33:31,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:31,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926967862] [2020-07-21 17:33:31,615 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 17:33:31,956 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:33:31,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:32,525 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 17:33:32,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:32,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926967862] [2020-07-21 17:33:32,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:32,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:33:32,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529932370] [2020-07-21 17:33:32,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:33:32,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:33:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:33:32,527 INFO L87 Difference]: Start difference. First operand 116786 states and 180972 transitions. Second operand 9 states. [2020-07-21 17:34:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:34:09,310 INFO L93 Difference]: Finished difference Result 631124 states and 992608 transitions. [2020-07-21 17:34:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 17:34:09,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 335 [2020-07-21 17:34:09,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:34:10,222 INFO L225 Difference]: With dead ends: 631124 [2020-07-21 17:34:10,222 INFO L226 Difference]: Without dead ends: 585079 [2020-07-21 17:34:10,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=873, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 17:34:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585079 states. [2020-07-21 17:34:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585079 to 216522. [2020-07-21 17:34:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216522 states. [2020-07-21 17:34:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216522 states to 216522 states and 336632 transitions. [2020-07-21 17:34:32,138 INFO L78 Accepts]: Start accepts. Automaton has 216522 states and 336632 transitions. Word has length 335 [2020-07-21 17:34:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:34:32,138 INFO L479 AbstractCegarLoop]: Abstraction has 216522 states and 336632 transitions. [2020-07-21 17:34:32,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:34:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 216522 states and 336632 transitions. [2020-07-21 17:34:32,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:34:32,228 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:34:32,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:34:32,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:32,429 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:32,430 INFO L82 PathProgramCache]: Analyzing trace with hash 495229635, now seen corresponding path program 1 times [2020-07-21 17:34:32,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:32,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355488727] [2020-07-21 17:34:32,431 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 17:34:32,814 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:34:32,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2226 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:34:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:32,897 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 17:34:32,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:32,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355488727] [2020-07-21 17:34:32,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:32,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:34:32,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983373796] [2020-07-21 17:34:32,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:34:32,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:32,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:34:32,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:34:32,900 INFO L87 Difference]: Start difference. First operand 216522 states and 336632 transitions. Second operand 3 states. [2020-07-21 17:34:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:34:54,625 INFO L93 Difference]: Finished difference Result 546113 states and 854148 transitions. [2020-07-21 17:34:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:34:54,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 17:34:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:34:55,204 INFO L225 Difference]: With dead ends: 546113 [2020-07-21 17:34:55,204 INFO L226 Difference]: Without dead ends: 332886 [2020-07-21 17:34:55,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:34:55,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332886 states. [2020-07-21 17:35:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332886 to 291932. [2020-07-21 17:35:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291932 states. [2020-07-21 17:35:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291932 states to 291932 states and 459690 transitions. [2020-07-21 17:35:19,252 INFO L78 Accepts]: Start accepts. Automaton has 291932 states and 459690 transitions. Word has length 335 [2020-07-21 17:35:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:35:19,252 INFO L479 AbstractCegarLoop]: Abstraction has 291932 states and 459690 transitions. [2020-07-21 17:35:19,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:35:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 291932 states and 459690 transitions. [2020-07-21 17:35:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-21 17:35:19,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:35:19,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:35:19,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:35:19,549 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:35:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:35:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash -846909920, now seen corresponding path program 1 times [2020-07-21 17:35:19,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:35:19,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58302254] [2020-07-21 17:35:19,551 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 17:35:19,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:35:19,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:35:19,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:35:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:35:19,962 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 17:35:19,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:35:19,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58302254] [2020-07-21 17:35:19,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:35:19,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:35:19,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242301991] [2020-07-21 17:35:19,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:35:19,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:35:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:35:19,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:35:19,965 INFO L87 Difference]: Start difference. First operand 291932 states and 459690 transitions. Second operand 3 states. [2020-07-21 17:35:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:35:59,155 INFO L93 Difference]: Finished difference Result 873578 states and 1375370 transitions. [2020-07-21 17:35:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:35:59,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-21 17:35:59,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:00,062 INFO L225 Difference]: With dead ends: 873578 [2020-07-21 17:36:00,062 INFO L226 Difference]: Without dead ends: 582765 [2020-07-21 17:36:00,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582765 states. [2020-07-21 17:36:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582765 to 292058. [2020-07-21 17:36:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292058 states. [2020-07-21 17:36:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292058 states to 292058 states and 459854 transitions. [2020-07-21 17:36:28,340 INFO L78 Accepts]: Start accepts. Automaton has 292058 states and 459854 transitions. Word has length 335 [2020-07-21 17:36:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:28,341 INFO L479 AbstractCegarLoop]: Abstraction has 292058 states and 459854 transitions. [2020-07-21 17:36:28,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 292058 states and 459854 transitions. [2020-07-21 17:36:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:36:28,451 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:28,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:28,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:28,664 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1475189482, now seen corresponding path program 1 times [2020-07-21 17:36:28,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:28,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315841135] [2020-07-21 17:36:28,666 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 17:36:29,660 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:36:29,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:29,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:29,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:29,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:29,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315841135] [2020-07-21 17:36:29,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:29,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:29,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203528648] [2020-07-21 17:36:29,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:29,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:29,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:29,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:29,770 INFO L87 Difference]: Start difference. First operand 292058 states and 459854 transitions. Second operand 3 states. [2020-07-21 17:37:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:37:11,941 INFO L93 Difference]: Finished difference Result 873578 states and 1375315 transitions. [2020-07-21 17:37:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:37:11,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 17:37:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:37:18,946 INFO L225 Difference]: With dead ends: 873578 [2020-07-21 17:37:18,947 INFO L226 Difference]: Without dead ends: 582735 [2020-07-21 17:37:19,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:37:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582735 states. [2020-07-21 17:37:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582735 to 292200. [2020-07-21 17:37:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292200 states. [2020-07-21 17:37:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292200 states to 292200 states and 460023 transitions. [2020-07-21 17:37:41,237 INFO L78 Accepts]: Start accepts. Automaton has 292200 states and 460023 transitions. Word has length 336 [2020-07-21 17:37:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:37:41,238 INFO L479 AbstractCegarLoop]: Abstraction has 292200 states and 460023 transitions. [2020-07-21 17:37:41,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:37:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 292200 states and 460023 transitions. [2020-07-21 17:37:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:37:41,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:37:41,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:37:41,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:41,544 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:37:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:37:41,545 INFO L82 PathProgramCache]: Analyzing trace with hash -850398187, now seen corresponding path program 1 times [2020-07-21 17:37:41,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:37:41,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645967912] [2020-07-21 17:37:41,546 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 17:37:41,849 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:37:41,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:37:41,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:37:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:37:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:37:41,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:37:41,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645967912] [2020-07-21 17:37:41,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:37:41,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:37:41,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799649589] [2020-07-21 17:37:41,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:37:41,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:37:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:37:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:37:41,983 INFO L87 Difference]: Start difference. First operand 292200 states and 460023 transitions. Second operand 4 states. [2020-07-21 17:38:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:38:26,179 INFO L93 Difference]: Finished difference Result 762271 states and 1213952 transitions. [2020-07-21 17:38:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:38:26,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 17:38:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:38:27,013 INFO L225 Difference]: With dead ends: 762271 [2020-07-21 17:38:27,013 INFO L226 Difference]: Without dead ends: 564484 [2020-07-21 17:38:27,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:38:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564484 states. [2020-07-21 17:39:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564484 to 564482. [2020-07-21 17:39:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564482 states. [2020-07-21 17:39:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564482 states to 564482 states and 888749 transitions. [2020-07-21 17:39:23,273 INFO L78 Accepts]: Start accepts. Automaton has 564482 states and 888749 transitions. Word has length 336 [2020-07-21 17:39:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:39:23,274 INFO L479 AbstractCegarLoop]: Abstraction has 564482 states and 888749 transitions. [2020-07-21 17:39:23,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:39:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 564482 states and 888749 transitions. [2020-07-21 17:39:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:39:23,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:39:23,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:39:23,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:39:23,668 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:39:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:39:23,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1670888806, now seen corresponding path program 1 times [2020-07-21 17:39:23,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:39:23,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339977215] [2020-07-21 17:39:23,670 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 17:39:23,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:39:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:39:23,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 17:39:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:39:24,250 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 17:39:24,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:39:24,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339977215] [2020-07-21 17:39:24,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:39:24,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 17:39:24,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919961387] [2020-07-21 17:39:24,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 17:39:24,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:39:24,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 17:39:24,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 17:39:24,252 INFO L87 Difference]: Start difference. First operand 564482 states and 888749 transitions. Second operand 12 states. [2020-07-21 17:42:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:42:54,271 INFO L93 Difference]: Finished difference Result 2263850 states and 3571512 transitions. [2020-07-21 17:42:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-21 17:42:54,272 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 336 [2020-07-21 17:42:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:42:58,052 INFO L225 Difference]: With dead ends: 2263850 [2020-07-21 17:42:58,053 INFO L226 Difference]: Without dead ends: 1907413 [2020-07-21 17:42:58,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=552, Invalid=1704, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 17:43:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907413 states.