/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:29:41,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:29:41,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:29:41,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:29:41,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:29:41,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:29:41,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:29:41,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:29:41,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:29:41,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:29:41,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:29:41,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:29:41,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:29:41,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:29:41,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:29:41,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:29:41,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:29:41,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:29:41,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:29:41,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:29:41,684 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:29:41,685 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:29:41,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:29:41,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:29:41,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:29:41,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:29:41,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:29:41,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:29:41,700 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:29:41,715 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:29:41,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:29:41,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:29:41,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:29:41,717 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:29:41,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:29:41,718 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:29:41,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:29:41,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:29:41,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:29:41,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:29:41,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:29:41,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:29:41,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:29:41,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:29:41,719 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:29:41,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:29:41,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:29:41,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:29:41,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:29:41,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:29:41,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:29:41,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:29:41,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:29:41,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:29:41,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:29:41,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:41,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:29:41,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:29:41,722 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 -> 4 [2020-07-20 18:29:42,008 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:29:42,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:29:42,033 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:29:42,035 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:29:42,035 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:29:42,037 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 18:29:42,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04f6cc886/ec9d4f0f5ba54b3b94f7fa0fe0fbb333/FLAG17e962ed1 [2020-07-20 18:29:42,769 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:29:42,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 18:29:42,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04f6cc886/ec9d4f0f5ba54b3b94f7fa0fe0fbb333/FLAG17e962ed1 [2020-07-20 18:29:42,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04f6cc886/ec9d4f0f5ba54b3b94f7fa0fe0fbb333 [2020-07-20 18:29:42,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:29:42,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:29:42,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:29:42,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:29:42,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:29:42,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:29:42" (1/1) ... [2020-07-20 18:29:42,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6776fe79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:42, skipping insertion in model container [2020-07-20 18:29:42,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:29:42" (1/1) ... [2020-07-20 18:29:42,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:29:43,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:29:44,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:29:44,198 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:29:44,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:29:44,707 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:29:44,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44 WrapperNode [2020-07-20 18:29:44,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:29:44,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:29:44,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:29:44,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:29:44,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... [2020-07-20 18:29:44,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... [2020-07-20 18:29:44,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... [2020-07-20 18:29:44,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... [2020-07-20 18:29:44,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... [2020-07-20 18:29:44,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... [2020-07-20 18:29:44,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... [2020-07-20 18:29:44,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:29:44,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:29:44,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:29:44,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:29:44,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:29:45,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:29:45,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:29:45,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:29:45,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:29:45,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:29:45,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:29:45,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 18:29:45,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:29:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:29:45,045 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:29:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:29:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:29:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:29:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:29:45,046 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:29:45,047 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:29:45,047 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:29:45,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:29:47,717 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:29:47,718 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:29:47,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:29:47 BoogieIcfgContainer [2020-07-20 18:29:47,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:29:47,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:29:47,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:29:47,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:29:47,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:29:42" (1/3) ... [2020-07-20 18:29:47,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59358ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:29:47, skipping insertion in model container [2020-07-20 18:29:47,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:29:44" (2/3) ... [2020-07-20 18:29:47,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59358ce0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:29:47, skipping insertion in model container [2020-07-20 18:29:47,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:29:47" (3/3) ... [2020-07-20 18:29:47,737 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 18:29:47,751 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:29:47,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:29:47,776 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:29:47,809 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:29:47,810 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:29:47,810 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:29:47,810 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:29:47,810 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:29:47,811 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:29:47,811 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:29:47,811 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:29:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-20 18:29:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 18:29:47,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:47,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:29:47,877 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-20 18:29:47,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:47,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719321671] [2020-07-20 18:29:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:48,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:29:48,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:29:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:48,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:48,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719321671] [2020-07-20 18:29:48,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:48,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:48,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594959726] [2020-07-20 18:29:48,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:48,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:48,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:48,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:48,657 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 3 states. [2020-07-20 18:29:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:49,078 INFO L93 Difference]: Finished difference Result 1489 states and 2621 transitions. [2020-07-20 18:29:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:49,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 18:29:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:49,119 INFO L225 Difference]: With dead ends: 1489 [2020-07-20 18:29:49,119 INFO L226 Difference]: Without dead ends: 1273 [2020-07-20 18:29:49,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2020-07-20 18:29:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1271. [2020-07-20 18:29:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1271 states. [2020-07-20 18:29:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1978 transitions. [2020-07-20 18:29:49,249 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1978 transitions. Word has length 326 [2020-07-20 18:29:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:49,250 INFO L479 AbstractCegarLoop]: Abstraction has 1271 states and 1978 transitions. [2020-07-20 18:29:49,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1978 transitions. [2020-07-20 18:29:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 18:29:49,257 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:49,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:29:49,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:49,473 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:49,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:49,475 INFO L82 PathProgramCache]: Analyzing trace with hash 420377409, now seen corresponding path program 1 times [2020-07-20 18:29:49,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:49,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871776133] [2020-07-20 18:29:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:49,820 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:29:49,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:29:49,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:50,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:50,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871776133] [2020-07-20 18:29:50,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:50,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:50,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638375493] [2020-07-20 18:29:50,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:50,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:50,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:50,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:50,005 INFO L87 Difference]: Start difference. First operand 1271 states and 1978 transitions. Second operand 3 states. [2020-07-20 18:29:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:50,196 INFO L93 Difference]: Finished difference Result 2607 states and 4089 transitions. [2020-07-20 18:29:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:50,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 18:29:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:50,208 INFO L225 Difference]: With dead ends: 2607 [2020-07-20 18:29:50,209 INFO L226 Difference]: Without dead ends: 2225 [2020-07-20 18:29:50,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-07-20 18:29:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-07-20 18:29:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-07-20 18:29:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3452 transitions. [2020-07-20 18:29:50,285 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3452 transitions. Word has length 326 [2020-07-20 18:29:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:50,286 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3452 transitions. [2020-07-20 18:29:50,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3452 transitions. [2020-07-20 18:29:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 18:29:50,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:50,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:29:50,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:50,509 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:50,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1550523160, now seen corresponding path program 1 times [2020-07-20 18:29:50,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:50,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699336010] [2020-07-20 18:29:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:50,868 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:29:50,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:50,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:29:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:50,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:50,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699336010] [2020-07-20 18:29:50,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:50,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:50,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814037536] [2020-07-20 18:29:51,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:51,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:51,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:51,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:51,001 INFO L87 Difference]: Start difference. First operand 2223 states and 3452 transitions. Second operand 3 states. [2020-07-20 18:29:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:51,230 INFO L93 Difference]: Finished difference Result 4715 states and 7386 transitions. [2020-07-20 18:29:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:51,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 18:29:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:51,251 INFO L225 Difference]: With dead ends: 4715 [2020-07-20 18:29:51,251 INFO L226 Difference]: Without dead ends: 4049 [2020-07-20 18:29:51,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2020-07-20 18:29:51,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 4047. [2020-07-20 18:29:51,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4047 states. [2020-07-20 18:29:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 6268 transitions. [2020-07-20 18:29:51,432 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 6268 transitions. Word has length 326 [2020-07-20 18:29:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:51,433 INFO L479 AbstractCegarLoop]: Abstraction has 4047 states and 6268 transitions. [2020-07-20 18:29:51,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 6268 transitions. [2020-07-20 18:29:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 18:29:51,443 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:51,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:29:51,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:51,656 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 405693337, now seen corresponding path program 1 times [2020-07-20 18:29:51,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:51,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564919829] [2020-07-20 18:29:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:52,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:29:52,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:52,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:29:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:52,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:52,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564919829] [2020-07-20 18:29:52,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:52,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:29:52,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143134357] [2020-07-20 18:29:52,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:29:52,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:52,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:29:52,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:29:52,192 INFO L87 Difference]: Start difference. First operand 4047 states and 6268 transitions. Second operand 4 states. [2020-07-20 18:29:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:52,653 INFO L93 Difference]: Finished difference Result 11918 states and 18427 transitions. [2020-07-20 18:29:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:29:52,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 18:29:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:52,690 INFO L225 Difference]: With dead ends: 11918 [2020-07-20 18:29:52,691 INFO L226 Difference]: Without dead ends: 7924 [2020-07-20 18:29:52,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:29:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7924 states. [2020-07-20 18:29:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7924 to 7922. [2020-07-20 18:29:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7922 states. [2020-07-20 18:29:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7922 states to 7922 states and 12192 transitions. [2020-07-20 18:29:53,024 INFO L78 Accepts]: Start accepts. Automaton has 7922 states and 12192 transitions. Word has length 326 [2020-07-20 18:29:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:53,025 INFO L479 AbstractCegarLoop]: Abstraction has 7922 states and 12192 transitions. [2020-07-20 18:29:53,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:29:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7922 states and 12192 transitions. [2020-07-20 18:29:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:29:53,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:53,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:29:53,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:53,259 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:53,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:53,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1255202774, now seen corresponding path program 1 times [2020-07-20 18:29:53,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:53,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090464841] [2020-07-20 18:29:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:53,629 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:29:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:29:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:53,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:53,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090464841] [2020-07-20 18:29:53,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:53,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:53,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126788140] [2020-07-20 18:29:53,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:53,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:53,804 INFO L87 Difference]: Start difference. First operand 7922 states and 12192 transitions. Second operand 3 states. [2020-07-20 18:29:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:54,252 INFO L93 Difference]: Finished difference Result 23312 states and 35788 transitions. [2020-07-20 18:29:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:54,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 18:29:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:54,319 INFO L225 Difference]: With dead ends: 23312 [2020-07-20 18:29:54,319 INFO L226 Difference]: Without dead ends: 15519 [2020-07-20 18:29:54,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15519 states. [2020-07-20 18:29:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15519 to 15517. [2020-07-20 18:29:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15517 states. [2020-07-20 18:29:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15517 states to 15517 states and 23731 transitions. [2020-07-20 18:29:54,927 INFO L78 Accepts]: Start accepts. Automaton has 15517 states and 23731 transitions. Word has length 328 [2020-07-20 18:29:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:54,928 INFO L479 AbstractCegarLoop]: Abstraction has 15517 states and 23731 transitions. [2020-07-20 18:29:54,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 15517 states and 23731 transitions. [2020-07-20 18:29:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:29:54,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:54,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:29:55,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:55,182 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:55,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:55,182 INFO L82 PathProgramCache]: Analyzing trace with hash -693587217, now seen corresponding path program 1 times [2020-07-20 18:29:55,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:55,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235694972] [2020-07-20 18:29:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:55,408 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:29:55,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:29:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:55,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:55,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235694972] [2020-07-20 18:29:55,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:55,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:55,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320637825] [2020-07-20 18:29:55,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:55,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:55,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:55,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:55,486 INFO L87 Difference]: Start difference. First operand 15517 states and 23731 transitions. Second operand 3 states. [2020-07-20 18:29:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:56,179 INFO L93 Difference]: Finished difference Result 46229 states and 70624 transitions. [2020-07-20 18:29:56,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:56,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 18:29:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:56,252 INFO L225 Difference]: With dead ends: 46229 [2020-07-20 18:29:56,253 INFO L226 Difference]: Without dead ends: 30877 [2020-07-20 18:29:56,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30877 states. [2020-07-20 18:29:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30877 to 15539. [2020-07-20 18:29:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15539 states. [2020-07-20 18:29:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15539 states to 15539 states and 23758 transitions. [2020-07-20 18:29:57,887 INFO L78 Accepts]: Start accepts. Automaton has 15539 states and 23758 transitions. Word has length 328 [2020-07-20 18:29:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:57,888 INFO L479 AbstractCegarLoop]: Abstraction has 15539 states and 23758 transitions. [2020-07-20 18:29:57,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 15539 states and 23758 transitions. [2020-07-20 18:29:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-20 18:29:57,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:57,911 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] [2020-07-20 18:29:58,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:58,125 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1878737653, now seen corresponding path program 1 times [2020-07-20 18:29:58,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:58,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071899521] [2020-07-20 18:29:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:58,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:29:58,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:58,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:29:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:58,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:58,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071899521] [2020-07-20 18:29:58,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:58,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:58,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342650763] [2020-07-20 18:29:58,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:58,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:58,552 INFO L87 Difference]: Start difference. First operand 15539 states and 23758 transitions. Second operand 3 states. [2020-07-20 18:29:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:59,279 INFO L93 Difference]: Finished difference Result 46272 states and 70681 transitions. [2020-07-20 18:29:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:59,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-20 18:29:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:59,376 INFO L225 Difference]: With dead ends: 46272 [2020-07-20 18:29:59,376 INFO L226 Difference]: Without dead ends: 30912 [2020-07-20 18:29:59,416 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 [2020-07-20 18:29:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30912 states. [2020-07-20 18:30:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30912 to 15568. [2020-07-20 18:30:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15568 states. [2020-07-20 18:30:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15568 states to 15568 states and 23795 transitions. [2020-07-20 18:30:00,124 INFO L78 Accepts]: Start accepts. Automaton has 15568 states and 23795 transitions. Word has length 329 [2020-07-20 18:30:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:00,125 INFO L479 AbstractCegarLoop]: Abstraction has 15568 states and 23795 transitions. [2020-07-20 18:30:00,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:30:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 15568 states and 23795 transitions. [2020-07-20 18:30:00,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 18:30:00,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:00,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:00,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:00,361 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:00,362 INFO L82 PathProgramCache]: Analyzing trace with hash -589516059, now seen corresponding path program 1 times [2020-07-20 18:30:00,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:00,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794268771] [2020-07-20 18:30:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:00,698 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:30:00,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:00,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:30:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:00,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:00,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794268771] [2020-07-20 18:30:00,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:00,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:30:00,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026509286] [2020-07-20 18:30:00,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:30:00,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:00,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:30:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:00,906 INFO L87 Difference]: Start difference. First operand 15568 states and 23795 transitions. Second operand 3 states. [2020-07-20 18:30:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:01,522 INFO L93 Difference]: Finished difference Result 44151 states and 67354 transitions. [2020-07-20 18:30:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:30:01,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 18:30:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:01,577 INFO L225 Difference]: With dead ends: 44151 [2020-07-20 18:30:01,577 INFO L226 Difference]: Without dead ends: 28798 [2020-07-20 18:30:01,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28798 states. [2020-07-20 18:30:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28798 to 28796. [2020-07-20 18:30:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28796 states. [2020-07-20 18:30:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28796 states to 28796 states and 43691 transitions. [2020-07-20 18:30:02,505 INFO L78 Accepts]: Start accepts. Automaton has 28796 states and 43691 transitions. Word has length 330 [2020-07-20 18:30:02,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:02,505 INFO L479 AbstractCegarLoop]: Abstraction has 28796 states and 43691 transitions. [2020-07-20 18:30:02,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:30:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 28796 states and 43691 transitions. [2020-07-20 18:30:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 18:30:02,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:02,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:02,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:02,737 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1550077698, now seen corresponding path program 1 times [2020-07-20 18:30:02,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:02,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502024312] [2020-07-20 18:30:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:02,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:30:02,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:30:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:03,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:03,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502024312] [2020-07-20 18:30:03,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:03,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:30:03,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634486968] [2020-07-20 18:30:03,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:30:03,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:03,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:30:03,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:30:03,064 INFO L87 Difference]: Start difference. First operand 28796 states and 43691 transitions. Second operand 4 states. [2020-07-20 18:30:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:03,978 INFO L93 Difference]: Finished difference Result 58211 states and 88278 transitions. [2020-07-20 18:30:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:30:03,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 18:30:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:04,024 INFO L225 Difference]: With dead ends: 58211 [2020-07-20 18:30:04,024 INFO L226 Difference]: Without dead ends: 29536 [2020-07-20 18:30:04,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:30:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29536 states. [2020-07-20 18:30:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29536 to 28792. [2020-07-20 18:30:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28792 states. [2020-07-20 18:30:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28792 states to 28792 states and 43674 transitions. [2020-07-20 18:30:05,887 INFO L78 Accepts]: Start accepts. Automaton has 28792 states and 43674 transitions. Word has length 330 [2020-07-20 18:30:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:05,887 INFO L479 AbstractCegarLoop]: Abstraction has 28792 states and 43674 transitions. [2020-07-20 18:30:05,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:30:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28792 states and 43674 transitions. [2020-07-20 18:30:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 18:30:05,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:05,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:06,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:06,114 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:06,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:06,115 INFO L82 PathProgramCache]: Analyzing trace with hash -720360095, now seen corresponding path program 1 times [2020-07-20 18:30:06,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:06,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915278242] [2020-07-20 18:30:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:06,336 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:30:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:30:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:06,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:06,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915278242] [2020-07-20 18:30:06,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:06,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:30:06,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872368887] [2020-07-20 18:30:06,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:30:06,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:06,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:30:06,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:06,396 INFO L87 Difference]: Start difference. First operand 28792 states and 43674 transitions. Second operand 3 states. [2020-07-20 18:30:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:07,596 INFO L93 Difference]: Finished difference Result 85990 states and 130365 transitions. [2020-07-20 18:30:07,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:30:07,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-20 18:30:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:07,655 INFO L225 Difference]: With dead ends: 85990 [2020-07-20 18:30:07,655 INFO L226 Difference]: Without dead ends: 57397 [2020-07-20 18:30:07,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:07,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57397 states. [2020-07-20 18:30:08,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57397 to 28818. [2020-07-20 18:30:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28818 states. [2020-07-20 18:30:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28818 states to 28818 states and 43706 transitions. [2020-07-20 18:30:08,585 INFO L78 Accepts]: Start accepts. Automaton has 28818 states and 43706 transitions. Word has length 332 [2020-07-20 18:30:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:08,585 INFO L479 AbstractCegarLoop]: Abstraction has 28818 states and 43706 transitions. [2020-07-20 18:30:08,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:30:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 28818 states and 43706 transitions. [2020-07-20 18:30:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 18:30:08,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:08,758 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] [2020-07-20 18:30:08,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:08,972 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash -919347304, now seen corresponding path program 1 times [2020-07-20 18:30:08,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:08,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263783286] [2020-07-20 18:30:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:09,198 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:30:09,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:09,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:30:09,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:09,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:09,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263783286] [2020-07-20 18:30:09,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:09,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:30:09,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577331071] [2020-07-20 18:30:09,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:30:09,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:09,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:30:09,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:30:09,278 INFO L87 Difference]: Start difference. First operand 28818 states and 43706 transitions. Second operand 4 states. [2020-07-20 18:30:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:10,903 INFO L93 Difference]: Finished difference Result 83504 states and 126480 transitions. [2020-07-20 18:30:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:30:10,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 18:30:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:10,957 INFO L225 Difference]: With dead ends: 83504 [2020-07-20 18:30:10,958 INFO L226 Difference]: Without dead ends: 55416 [2020-07-20 18:30:10,987 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 [2020-07-20 18:30:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55416 states. [2020-07-20 18:30:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55416 to 29281. [2020-07-20 18:30:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29281 states. [2020-07-20 18:30:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29281 states to 29281 states and 44477 transitions. [2020-07-20 18:30:11,882 INFO L78 Accepts]: Start accepts. Automaton has 29281 states and 44477 transitions. Word has length 333 [2020-07-20 18:30:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:11,883 INFO L479 AbstractCegarLoop]: Abstraction has 29281 states and 44477 transitions. [2020-07-20 18:30:11,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:30:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 29281 states and 44477 transitions. [2020-07-20 18:30:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 18:30:11,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:11,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:12,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:12,128 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash -550785178, now seen corresponding path program 1 times [2020-07-20 18:30:12,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:12,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728547389] [2020-07-20 18:30:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:12,476 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:30:12,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 18:30:12,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:12,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:12,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728547389] [2020-07-20 18:30:12,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:12,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:30:12,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689934460] [2020-07-20 18:30:12,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:30:12,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:30:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:30:12,746 INFO L87 Difference]: Start difference. First operand 29281 states and 44477 transitions. Second operand 8 states. [2020-07-20 18:30:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:18,404 INFO L93 Difference]: Finished difference Result 90779 states and 140725 transitions. [2020-07-20 18:30:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:30:18,405 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 335 [2020-07-20 18:30:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:18,471 INFO L225 Difference]: With dead ends: 90779 [2020-07-20 18:30:18,471 INFO L226 Difference]: Without dead ends: 63535 [2020-07-20 18:30:18,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:30:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63535 states. [2020-07-20 18:30:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63535 to 38701. [2020-07-20 18:30:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38701 states. [2020-07-20 18:30:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38701 states to 38701 states and 58497 transitions. [2020-07-20 18:30:20,237 INFO L78 Accepts]: Start accepts. Automaton has 38701 states and 58497 transitions. Word has length 335 [2020-07-20 18:30:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:20,238 INFO L479 AbstractCegarLoop]: Abstraction has 38701 states and 58497 transitions. [2020-07-20 18:30:20,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:30:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 38701 states and 58497 transitions. [2020-07-20 18:30:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 18:30:20,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:20,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:20,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:20,460 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:20,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1364311378, now seen corresponding path program 1 times [2020-07-20 18:30:20,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:20,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793029021] [2020-07-20 18:30:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:20,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:30:20,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:30:20,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:20,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:20,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793029021] [2020-07-20 18:30:20,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:20,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:30:20,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340312699] [2020-07-20 18:30:20,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:30:20,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:30:20,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:20,900 INFO L87 Difference]: Start difference. First operand 38701 states and 58497 transitions. Second operand 3 states. [2020-07-20 18:30:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:23,098 INFO L93 Difference]: Finished difference Result 87563 states and 133051 transitions. [2020-07-20 18:30:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:30:23,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 18:30:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:23,158 INFO L225 Difference]: With dead ends: 87563 [2020-07-20 18:30:23,158 INFO L226 Difference]: Without dead ends: 50795 [2020-07-20 18:30:23,190 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 [2020-07-20 18:30:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50795 states. [2020-07-20 18:30:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50795 to 45433. [2020-07-20 18:30:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45433 states. [2020-07-20 18:30:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45433 states to 45433 states and 69227 transitions. [2020-07-20 18:30:26,609 INFO L78 Accepts]: Start accepts. Automaton has 45433 states and 69227 transitions. Word has length 335 [2020-07-20 18:30:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:26,610 INFO L479 AbstractCegarLoop]: Abstraction has 45433 states and 69227 transitions. [2020-07-20 18:30:26,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:30:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 45433 states and 69227 transitions. [2020-07-20 18:30:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 18:30:26,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:26,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:26,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:26,839 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:26,840 INFO L82 PathProgramCache]: Analyzing trace with hash -682712333, now seen corresponding path program 1 times [2020-07-20 18:30:26,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:26,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908628818] [2020-07-20 18:30:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:27,083 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:30:27,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:30:27,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:27,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:27,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908628818] [2020-07-20 18:30:27,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:27,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:30:27,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480177919] [2020-07-20 18:30:27,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:30:27,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:27,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:30:27,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:30:27,206 INFO L87 Difference]: Start difference. First operand 45433 states and 69227 transitions. Second operand 9 states. [2020-07-20 18:30:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:38,214 INFO L93 Difference]: Finished difference Result 185733 states and 288552 transitions. [2020-07-20 18:30:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 18:30:38,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 335 [2020-07-20 18:30:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:38,435 INFO L225 Difference]: With dead ends: 185733 [2020-07-20 18:30:38,435 INFO L226 Difference]: Without dead ends: 170923 [2020-07-20 18:30:38,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-07-20 18:30:38,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170923 states. [2020-07-20 18:30:45,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170923 to 88403. [2020-07-20 18:30:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88403 states. [2020-07-20 18:30:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88403 states to 88403 states and 135367 transitions. [2020-07-20 18:30:45,559 INFO L78 Accepts]: Start accepts. Automaton has 88403 states and 135367 transitions. Word has length 335 [2020-07-20 18:30:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:45,559 INFO L479 AbstractCegarLoop]: Abstraction has 88403 states and 135367 transitions. [2020-07-20 18:30:45,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:30:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 88403 states and 135367 transitions. [2020-07-20 18:30:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 18:30:45,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:45,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:45,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:45,803 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2016864022, now seen corresponding path program 1 times [2020-07-20 18:30:45,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:45,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75911400] [2020-07-20 18:30:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:46,145 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:30:46,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:30:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:46,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:46,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75911400] [2020-07-20 18:30:46,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:46,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:30:46,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276844014] [2020-07-20 18:30:46,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:30:46,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:46,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:30:46,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:46,226 INFO L87 Difference]: Start difference. First operand 88403 states and 135367 transitions. Second operand 3 states. [2020-07-20 18:30:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:56,407 INFO L93 Difference]: Finished difference Result 264676 states and 405205 transitions. [2020-07-20 18:30:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:30:56,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 18:30:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:56,641 INFO L225 Difference]: With dead ends: 264676 [2020-07-20 18:30:56,641 INFO L226 Difference]: Without dead ends: 176443 [2020-07-20 18:30:56,724 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 [2020-07-20 18:30:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176443 states. [2020-07-20 18:31:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176443 to 88434. [2020-07-20 18:31:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88434 states. [2020-07-20 18:31:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88434 states to 88434 states and 135405 transitions. [2020-07-20 18:31:02,704 INFO L78 Accepts]: Start accepts. Automaton has 88434 states and 135405 transitions. Word has length 335 [2020-07-20 18:31:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:31:02,704 INFO L479 AbstractCegarLoop]: Abstraction has 88434 states and 135405 transitions. [2020-07-20 18:31:02,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:31:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 88434 states and 135405 transitions. [2020-07-20 18:31:02,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 18:31:02,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:31:02,744 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] [2020-07-20 18:31:02,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:02,945 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:31:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:31:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash 853547186, now seen corresponding path program 1 times [2020-07-20 18:31:02,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:31:02,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625739032] [2020-07-20 18:31:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:03,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:31:03,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:31:03,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:31:03,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:31:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:31:03,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:31:03,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625739032] [2020-07-20 18:31:03,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:31:03,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:31:03,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912488610] [2020-07-20 18:31:03,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:31:03,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:31:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:31:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:31:03,358 INFO L87 Difference]: Start difference. First operand 88434 states and 135405 transitions. Second operand 3 states. [2020-07-20 18:31:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:31:12,076 INFO L93 Difference]: Finished difference Result 223322 states and 344351 transitions. [2020-07-20 18:31:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:31:12,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 18:31:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:31:12,282 INFO L225 Difference]: With dead ends: 223322 [2020-07-20 18:31:12,283 INFO L226 Difference]: Without dead ends: 137288 [2020-07-20 18:31:12,364 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 [2020-07-20 18:31:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137288 states. [2020-07-20 18:31:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137288 to 123326. [2020-07-20 18:31:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123326 states. [2020-07-20 18:31:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123326 states to 123326 states and 191183 transitions. [2020-07-20 18:31:22,744 INFO L78 Accepts]: Start accepts. Automaton has 123326 states and 191183 transitions. Word has length 336 [2020-07-20 18:31:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:31:22,744 INFO L479 AbstractCegarLoop]: Abstraction has 123326 states and 191183 transitions. [2020-07-20 18:31:22,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:31:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 123326 states and 191183 transitions. [2020-07-20 18:31:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 18:31:22,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:31:22,778 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] [2020-07-20 18:31:22,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:22,979 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:31:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:31:22,980 INFO L82 PathProgramCache]: Analyzing trace with hash -884914129, now seen corresponding path program 1 times [2020-07-20 18:31:22,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:31:22,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265403840] [2020-07-20 18:31:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:23,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:31:23,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:31:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:31:23,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:31:23,217 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:31:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:31:23,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:31:23,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265403840] [2020-07-20 18:31:23,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:31:23,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:31:23,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286269262] [2020-07-20 18:31:23,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:31:23,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:31:23,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:31:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:31:23,277 INFO L87 Difference]: Start difference. First operand 123326 states and 191183 transitions. Second operand 4 states. [2020-07-20 18:31:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:31:40,069 INFO L93 Difference]: Finished difference Result 368522 states and 571111 transitions. [2020-07-20 18:31:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:31:40,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-20 18:31:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:31:40,434 INFO L225 Difference]: With dead ends: 368522 [2020-07-20 18:31:40,434 INFO L226 Difference]: Without dead ends: 246368 [2020-07-20 18:31:40,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:31:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246368 states. [2020-07-20 18:31:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246368 to 124344. [2020-07-20 18:31:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124344 states. [2020-07-20 18:31:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124344 states to 124344 states and 192851 transitions. [2020-07-20 18:31:49,716 INFO L78 Accepts]: Start accepts. Automaton has 124344 states and 192851 transitions. Word has length 336 [2020-07-20 18:31:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:31:49,716 INFO L479 AbstractCegarLoop]: Abstraction has 124344 states and 192851 transitions. [2020-07-20 18:31:49,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:31:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 124344 states and 192851 transitions. [2020-07-20 18:31:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 18:31:49,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:31:49,751 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] [2020-07-20 18:31:49,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:49,952 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:31:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:31:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash 225219909, now seen corresponding path program 1 times [2020-07-20 18:31:49,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:31:49,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980169190] [2020-07-20 18:31:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:50,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:31:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:31:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:31:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:31:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:31:50,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:31:50,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980169190] [2020-07-20 18:31:50,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:31:50,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:31:50,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269972644] [2020-07-20 18:31:50,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:31:50,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:31:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:31:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:31:50,807 INFO L87 Difference]: Start difference. First operand 124344 states and 192851 transitions. Second operand 9 states. [2020-07-20 18:32:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:32:42,239 INFO L93 Difference]: Finished difference Result 640138 states and 1004471 transitions. [2020-07-20 18:32:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 18:32:42,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 336 [2020-07-20 18:32:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:32:43,455 INFO L225 Difference]: With dead ends: 640138 [2020-07-20 18:32:43,455 INFO L226 Difference]: Without dead ends: 590908 [2020-07-20 18:32:43,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 18:32:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590908 states. [2020-07-20 18:33:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590908 to 266854. [2020-07-20 18:33:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266854 states. [2020-07-20 18:33:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266854 states to 266854 states and 415535 transitions. [2020-07-20 18:33:11,494 INFO L78 Accepts]: Start accepts. Automaton has 266854 states and 415535 transitions. Word has length 336 [2020-07-20 18:33:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:11,495 INFO L479 AbstractCegarLoop]: Abstraction has 266854 states and 415535 transitions. [2020-07-20 18:33:11,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:33:11,495 INFO L276 IsEmpty]: Start isEmpty. Operand 266854 states and 415535 transitions. [2020-07-20 18:33:11,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 18:33:11,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:11,575 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] [2020-07-20 18:33:11,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:11,776 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1799055165, now seen corresponding path program 1 times [2020-07-20 18:33:11,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:11,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127864671] [2020-07-20 18:33:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:12,118 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:12,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:12,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:12,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:12,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127864671] [2020-07-20 18:33:12,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:12,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:12,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286261235] [2020-07-20 18:33:12,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:12,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:12,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:12,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:12,179 INFO L87 Difference]: Start difference. First operand 266854 states and 415535 transitions. Second operand 3 states. [2020-07-20 18:33:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:50,039 INFO L93 Difference]: Finished difference Result 699046 states and 1092733 transitions. [2020-07-20 18:33:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:50,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 18:33:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:50,835 INFO L225 Difference]: With dead ends: 699046 [2020-07-20 18:33:50,836 INFO L226 Difference]: Without dead ends: 435462 [2020-07-20 18:33:51,061 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 [2020-07-20 18:33:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435462 states. [2020-07-20 18:34:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435462 to 395004. [2020-07-20 18:34:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395004 states. [2020-07-20 18:34:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395004 states to 395004 states and 618967 transitions. [2020-07-20 18:34:36,514 INFO L78 Accepts]: Start accepts. Automaton has 395004 states and 618967 transitions. Word has length 336 [2020-07-20 18:34:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:36,515 INFO L479 AbstractCegarLoop]: Abstraction has 395004 states and 618967 transitions. [2020-07-20 18:34:36,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:34:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 395004 states and 618967 transitions. [2020-07-20 18:34:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 18:34:36,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:36,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:34:36,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:36,788 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash 368641472, now seen corresponding path program 1 times [2020-07-20 18:34:36,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:36,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629318407] [2020-07-20 18:34:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:37,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:34:37,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1796 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:34:37,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:37,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:37,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629318407] [2020-07-20 18:34:37,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:37,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:34:37,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755044953] [2020-07-20 18:34:37,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:34:37,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:34:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:34:37,189 INFO L87 Difference]: Start difference. First operand 395004 states and 618967 transitions. Second operand 4 states. [2020-07-20 18:35:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:47,714 INFO L93 Difference]: Finished difference Result 1173204 states and 1838562 transitions. [2020-07-20 18:35:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:35:47,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 18:35:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:49,073 INFO L225 Difference]: With dead ends: 1173204 [2020-07-20 18:35:49,074 INFO L226 Difference]: Without dead ends: 780586 [2020-07-20 18:35:50,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:35:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780586 states. [2020-07-20 18:36:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780586 to 396085. [2020-07-20 18:36:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396085 states. [2020-07-20 18:36:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396085 states to 396085 states and 620827 transitions. [2020-07-20 18:36:39,325 INFO L78 Accepts]: Start accepts. Automaton has 396085 states and 620827 transitions. Word has length 337 [2020-07-20 18:36:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:39,325 INFO L479 AbstractCegarLoop]: Abstraction has 396085 states and 620827 transitions. [2020-07-20 18:36:39,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 396085 states and 620827 transitions. [2020-07-20 18:36:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 18:36:39,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:39,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:39,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:39,606 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:39,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1657470017, now seen corresponding path program 1 times [2020-07-20 18:36:39,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:39,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580586293] [2020-07-20 18:36:39,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:39,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:39,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:36:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:40,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:40,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580586293] [2020-07-20 18:36:40,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:40,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:36:40,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484875639] [2020-07-20 18:36:40,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:36:40,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:36:40,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:36:40,157 INFO L87 Difference]: Start difference. First operand 396085 states and 620827 transitions. Second operand 5 states. [2020-07-20 18:38:01,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:38:01,478 INFO L93 Difference]: Finished difference Result 1101347 states and 1738792 transitions. [2020-07-20 18:38:01,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:38:01,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2020-07-20 18:38:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:38:02,887 INFO L225 Difference]: With dead ends: 1101347 [2020-07-20 18:38:02,887 INFO L226 Difference]: Without dead ends: 777181 [2020-07-20 18:38:03,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 18:38:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777181 states. [2020-07-20 18:39:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777181 to 777179. [2020-07-20 18:39:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777179 states. [2020-07-20 18:39:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777179 states to 777179 states and 1217563 transitions. [2020-07-20 18:39:37,429 INFO L78 Accepts]: Start accepts. Automaton has 777179 states and 1217563 transitions. Word has length 338 [2020-07-20 18:39:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:39:37,430 INFO L479 AbstractCegarLoop]: Abstraction has 777179 states and 1217563 transitions. [2020-07-20 18:39:37,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:39:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 777179 states and 1217563 transitions. [2020-07-20 18:39:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 18:39:37,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:39:37,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:39:37,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:37,791 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:39:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:39:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1487579684, now seen corresponding path program 1 times [2020-07-20 18:39:37,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:39:37,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926892244] [2020-07-20 18:39:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:38,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:39:38,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:39:38,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:39:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:39:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:39:38,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:39:38,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926892244] [2020-07-20 18:39:38,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:39:38,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:39:38,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031918937] [2020-07-20 18:39:38,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:39:38,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:39:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:39:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:39:38,247 INFO L87 Difference]: Start difference. First operand 777179 states and 1217563 transitions. Second operand 4 states.