/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 15:44:54,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:44:54,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:44:54,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:44:54,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:44:54,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:44:54,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:44:54,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:44:54,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:44:54,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:44:54,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:44:54,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:44:54,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:44:54,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:44:54,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:44:54,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:44:54,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:44:54,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:44:54,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:44:54,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:44:54,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:44:54,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:44:54,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:44:54,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:44:54,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 15:44:54,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 15:44:54,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 15:44:54,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 15:44:54,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 15:44:54,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 15:44:54,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 15:44:54,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 15:44:54,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 15:44:54,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 15:44:54,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 15:44:54,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 15:44:54,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 15:44:54,609 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 15:44:54,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:44:54,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:44:54,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:44:54,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 15:44:54,631 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:44:54,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:44:54,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:44:54,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:44:54,634 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:44:54,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:44:54,635 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:44:54,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:44:54,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:44:54,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:44:54,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:44:54,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:44:54,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:44:54,637 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:44:54,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:44:54,638 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:44:54,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:44:54,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:44:54,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:44:54,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:44:54,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:44:54,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:44:54,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:44:54,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:44:54,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:44:54,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:44:54,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:54,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:44:54,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:44:54,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 15:44:54,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:44:54,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:44:54,933 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:44:54,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:44:54,934 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:44:54,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 15:44:55,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b190b225d/9d87b1be3ce54776a1574912decba8d9/FLAGd0cfad10d [2020-07-21 15:44:55,487 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:44:55,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 15:44:55,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b190b225d/9d87b1be3ce54776a1574912decba8d9/FLAGd0cfad10d [2020-07-21 15:44:55,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b190b225d/9d87b1be3ce54776a1574912decba8d9 [2020-07-21 15:44:55,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:44:55,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:44:55,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:55,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:44:55,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:44:55,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:55" (1/1) ... [2020-07-21 15:44:55,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c0d61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:55, skipping insertion in model container [2020-07-21 15:44:55,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:44:55" (1/1) ... [2020-07-21 15:44:55,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:44:55,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:44:56,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:56,147 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:44:56,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:44:56,206 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:44:56,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56 WrapperNode [2020-07-21 15:44:56,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:44:56,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:44:56,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:44:56,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:44:56,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... [2020-07-21 15:44:56,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:44:56,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:44:56,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:44:56,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:44:56,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:44:56,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:44:56,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:44:56,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 15:44:56,402 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 15:44:56,403 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 15:44:56,403 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 15:44:56,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:44:56,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:44:56,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 15:44:56,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 15:44:56,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 15:44:56,404 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 15:44:56,404 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 15:44:56,404 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 15:44:56,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:44:56,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:44:56,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:44:56,878 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:44:56,878 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 15:44:56,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:56 BoogieIcfgContainer [2020-07-21 15:44:56,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:44:56,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:44:56,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:44:56,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:44:56,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:44:55" (1/3) ... [2020-07-21 15:44:56,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308ef307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:56, skipping insertion in model container [2020-07-21 15:44:56,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:44:56" (2/3) ... [2020-07-21 15:44:56,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@308ef307 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:44:56, skipping insertion in model container [2020-07-21 15:44:56,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:44:56" (3/3) ... [2020-07-21 15:44:56,890 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-21 15:44:56,900 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:44:56,909 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:44:56,919 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:44:56,945 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:44:56,945 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:44:56,945 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:44:56,945 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:44:56,945 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:44:56,946 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:44:56,946 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:44:56,946 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:44:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 15:44:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 15:44:56,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:56,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:56,972 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 15:44:56,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:56,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172295008] [2020-07-21 15:44:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:57,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:57,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 15:44:57,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 15:44:57,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:44:57,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172295008] [2020-07-21 15:44:57,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:44:57,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 15:44:57,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972673199] [2020-07-21 15:44:57,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:44:57,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:44:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:44:57,274 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 6 states. [2020-07-21 15:44:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:57,412 INFO L93 Difference]: Finished difference Result 135 states and 209 transitions. [2020-07-21 15:44:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:44:57,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-07-21 15:44:57,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:57,427 INFO L225 Difference]: With dead ends: 135 [2020-07-21 15:44:57,428 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 15:44:57,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:44:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 15:44:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-07-21 15:44:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 15:44:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 99 transitions. [2020-07-21 15:44:57,492 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 99 transitions. Word has length 48 [2020-07-21 15:44:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:57,493 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 99 transitions. [2020-07-21 15:44:57,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:44:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 99 transitions. [2020-07-21 15:44:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 15:44:57,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:57,498 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:57,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:57,713 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash -243075725, now seen corresponding path program 1 times [2020-07-21 15:44:57,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:57,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901653499] [2020-07-21 15:44:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:57,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:57,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:57,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 15:44:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 15:44:57,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:44:57,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901653499] [2020-07-21 15:44:57,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:44:57,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-21 15:44:57,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074864958] [2020-07-21 15:44:57,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:44:57,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:57,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:44:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:44:57,926 INFO L87 Difference]: Start difference. First operand 69 states and 99 transitions. Second operand 6 states. [2020-07-21 15:44:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:58,028 INFO L93 Difference]: Finished difference Result 121 states and 171 transitions. [2020-07-21 15:44:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:44:58,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-21 15:44:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:58,034 INFO L225 Difference]: With dead ends: 121 [2020-07-21 15:44:58,035 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 15:44:58,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:44:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 15:44:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-07-21 15:44:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 15:44:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 114 transitions. [2020-07-21 15:44:58,072 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 114 transitions. Word has length 52 [2020-07-21 15:44:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:58,072 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 114 transitions. [2020-07-21 15:44:58,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:44:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 114 transitions. [2020-07-21 15:44:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 15:44:58,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:58,082 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:58,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,284 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:58,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:58,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2057746865, now seen corresponding path program 1 times [2020-07-21 15:44:58,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:58,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241278532] [2020-07-21 15:44:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,347 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:58,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 15:44:58,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:58,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:58,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241278532] [2020-07-21 15:44:58,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:58,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:58,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617926298] [2020-07-21 15:44:58,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:58,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:58,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:58,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:58,376 INFO L87 Difference]: Start difference. First operand 79 states and 114 transitions. Second operand 4 states. [2020-07-21 15:44:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:58,465 INFO L93 Difference]: Finished difference Result 150 states and 219 transitions. [2020-07-21 15:44:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:44:58,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-07-21 15:44:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:58,467 INFO L225 Difference]: With dead ends: 150 [2020-07-21 15:44:58,468 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 15:44:58,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 15:44:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2020-07-21 15:44:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 15:44:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2020-07-21 15:44:58,481 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 52 [2020-07-21 15:44:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:58,481 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2020-07-21 15:44:58,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2020-07-21 15:44:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 15:44:58,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:58,484 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:58,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,698 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:58,699 INFO L82 PathProgramCache]: Analyzing trace with hash 922622062, now seen corresponding path program 1 times [2020-07-21 15:44:58,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:58,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646560770] [2020-07-21 15:44:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:58,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:58,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:44:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:58,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:58,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646560770] [2020-07-21 15:44:58,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:58,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:58,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411397027] [2020-07-21 15:44:58,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:58,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:58,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:58,773 INFO L87 Difference]: Start difference. First operand 65 states and 88 transitions. Second operand 4 states. [2020-07-21 15:44:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:58,845 INFO L93 Difference]: Finished difference Result 129 states and 179 transitions. [2020-07-21 15:44:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:44:58,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-07-21 15:44:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:58,848 INFO L225 Difference]: With dead ends: 129 [2020-07-21 15:44:58,848 INFO L226 Difference]: Without dead ends: 74 [2020-07-21 15:44:58,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-21 15:44:58,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-07-21 15:44:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 15:44:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2020-07-21 15:44:58,861 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 55 [2020-07-21 15:44:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:58,862 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2020-07-21 15:44:58,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2020-07-21 15:44:58,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 15:44:58,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:58,867 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:59,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,074 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:59,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash 82967328, now seen corresponding path program 1 times [2020-07-21 15:44:59,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:59,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103724067] [2020-07-21 15:44:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:44:59,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:59,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:44:59,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:59,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:59,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103724067] [2020-07-21 15:44:59,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:59,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:59,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198239720] [2020-07-21 15:44:59,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:59,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:59,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:59,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:59,155 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand 4 states. [2020-07-21 15:44:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:59,216 INFO L93 Difference]: Finished difference Result 140 states and 197 transitions. [2020-07-21 15:44:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:44:59,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-07-21 15:44:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:59,219 INFO L225 Difference]: With dead ends: 140 [2020-07-21 15:44:59,219 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 15:44:59,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 15:44:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-07-21 15:44:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 15:44:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-21 15:44:59,232 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 56 [2020-07-21 15:44:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:59,233 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-21 15:44:59,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-21 15:44:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 15:44:59,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:59,235 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:59,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,448 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -555510436, now seen corresponding path program 1 times [2020-07-21 15:44:59,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:59,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632178390] [2020-07-21 15:44:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:44:59,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:59,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 15:44:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:59,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:59,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632178390] [2020-07-21 15:44:59,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:59,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:44:59,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071705264] [2020-07-21 15:44:59,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:44:59,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:59,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:44:59,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:44:59,544 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 4 states. [2020-07-21 15:44:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:44:59,628 INFO L93 Difference]: Finished difference Result 147 states and 207 transitions. [2020-07-21 15:44:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:44:59,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-07-21 15:44:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:44:59,631 INFO L225 Difference]: With dead ends: 147 [2020-07-21 15:44:59,631 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 15:44:59,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 15:44:59,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-07-21 15:44:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 15:44:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 102 transitions. [2020-07-21 15:44:59,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 102 transitions. Word has length 56 [2020-07-21 15:44:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:44:59,644 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 102 transitions. [2020-07-21 15:44:59,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:44:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 102 transitions. [2020-07-21 15:44:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 15:44:59,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:44:59,646 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:44:59,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,859 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:44:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:44:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash -577786995, now seen corresponding path program 1 times [2020-07-21 15:44:59,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:44:59,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658332359] [2020-07-21 15:44:59,862 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:44:59,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:44:59,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:44:59,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:44:59,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:44:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:44:59,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:44:59,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658332359] [2020-07-21 15:44:59,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:44:59,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:44:59,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498009413] [2020-07-21 15:44:59,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:44:59,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:44:59,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:44:59,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:44:59,956 INFO L87 Difference]: Start difference. First operand 74 states and 102 transitions. Second operand 5 states. [2020-07-21 15:45:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:00,098 INFO L93 Difference]: Finished difference Result 155 states and 220 transitions. [2020-07-21 15:45:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:45:00,100 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-07-21 15:45:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:00,102 INFO L225 Difference]: With dead ends: 155 [2020-07-21 15:45:00,102 INFO L226 Difference]: Without dead ends: 91 [2020-07-21 15:45:00,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:45:00,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-21 15:45:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2020-07-21 15:45:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 15:45:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2020-07-21 15:45:00,127 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 57 [2020-07-21 15:45:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:00,128 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2020-07-21 15:45:00,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:45:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2020-07-21 15:45:00,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 15:45:00,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:00,130 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:00,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,344 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash -764226497, now seen corresponding path program 1 times [2020-07-21 15:45:00,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:00,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150533436] [2020-07-21 15:45:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:00,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:45:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:00,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:00,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150533436] [2020-07-21 15:45:00,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:00,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 15:45:00,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984132394] [2020-07-21 15:45:00,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:45:00,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:00,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:45:00,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:45:00,568 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand 8 states. [2020-07-21 15:45:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:00,668 INFO L93 Difference]: Finished difference Result 166 states and 240 transitions. [2020-07-21 15:45:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:00,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-07-21 15:45:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:00,672 INFO L225 Difference]: With dead ends: 166 [2020-07-21 15:45:00,672 INFO L226 Difference]: Without dead ends: 101 [2020-07-21 15:45:00,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-21 15:45:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-07-21 15:45:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-21 15:45:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 117 transitions. [2020-07-21 15:45:00,694 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 117 transitions. Word has length 58 [2020-07-21 15:45:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:00,695 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 117 transitions. [2020-07-21 15:45:00,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:45:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 117 transitions. [2020-07-21 15:45:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 15:45:00,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:00,696 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:00,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,910 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:00,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1858385694, now seen corresponding path program 1 times [2020-07-21 15:45:00,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:00,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508360371] [2020-07-21 15:45:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:00,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:00,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 15:45:00,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:01,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:01,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508360371] [2020-07-21 15:45:01,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:01,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 15:45:01,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624496622] [2020-07-21 15:45:01,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:45:01,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:45:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:01,139 INFO L87 Difference]: Start difference. First operand 83 states and 117 transitions. Second operand 10 states. [2020-07-21 15:45:07,526 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 15:45:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:07,720 INFO L93 Difference]: Finished difference Result 188 states and 275 transitions. [2020-07-21 15:45:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:45:07,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-07-21 15:45:07,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:07,723 INFO L225 Difference]: With dead ends: 188 [2020-07-21 15:45:07,724 INFO L226 Difference]: Without dead ends: 115 [2020-07-21 15:45:07,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:45:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-21 15:45:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2020-07-21 15:45:07,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 15:45:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2020-07-21 15:45:07,736 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 60 [2020-07-21 15:45:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:07,737 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2020-07-21 15:45:07,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:45:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2020-07-21 15:45:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 15:45:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:07,738 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:07,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,940 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash 372577582, now seen corresponding path program 2 times [2020-07-21 15:45:07,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:07,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670405383] [2020-07-21 15:45:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:07,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:07,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:45:07,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:08,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:08,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670405383] [2020-07-21 15:45:08,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:08,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 15:45:08,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527702469] [2020-07-21 15:45:08,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:45:08,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:45:08,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:45:08,211 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand 14 states. [2020-07-21 15:45:08,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:08,384 INFO L93 Difference]: Finished difference Result 229 states and 343 transitions. [2020-07-21 15:45:08,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 15:45:08,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-07-21 15:45:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:08,389 INFO L225 Difference]: With dead ends: 229 [2020-07-21 15:45:08,389 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 15:45:08,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:45:08,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 15:45:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2020-07-21 15:45:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 15:45:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 147 transitions. [2020-07-21 15:45:08,411 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 147 transitions. Word has length 67 [2020-07-21 15:45:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:08,412 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 147 transitions. [2020-07-21 15:45:08,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:45:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 147 transitions. [2020-07-21 15:45:08,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-21 15:45:08,413 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:08,413 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:08,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:08,627 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash -298995106, now seen corresponding path program 2 times [2020-07-21 15:45:08,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:08,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468160477] [2020-07-21 15:45:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:08,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:45:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:45:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 15:45:08,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:45:08,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468160477] [2020-07-21 15:45:08,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:45:08,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 15:45:08,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333051549] [2020-07-21 15:45:08,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 15:45:08,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:08,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 15:45:08,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:45:08,747 INFO L87 Difference]: Start difference. First operand 101 states and 147 transitions. Second operand 8 states. [2020-07-21 15:45:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:45:08,870 INFO L93 Difference]: Finished difference Result 138 states and 195 transitions. [2020-07-21 15:45:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:45:08,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-07-21 15:45:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:45:08,873 INFO L225 Difference]: With dead ends: 138 [2020-07-21 15:45:08,873 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 15:45:08,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:45:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 15:45:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2020-07-21 15:45:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-21 15:45:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 162 transitions. [2020-07-21 15:45:08,885 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 162 transitions. Word has length 72 [2020-07-21 15:45:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:45:08,886 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 162 transitions. [2020-07-21 15:45:08,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 15:45:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 162 transitions. [2020-07-21 15:45:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-21 15:45:08,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:45:08,887 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:45:09,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:09,103 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:45:09,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:45:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1310112356, now seen corresponding path program 1 times [2020-07-21 15:45:09,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:45:09,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974352087] [2020-07-21 15:45:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:45:09,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:45:09,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:45:09,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 15:45:09,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:45:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:45:09,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:45:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:45:09,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974352087] [2020-07-21 15:45:09,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:45:09,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 15:45:09,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326068907] [2020-07-21 15:45:09,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 15:45:09,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:45:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 15:45:09,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 15:45:09,535 INFO L87 Difference]: Start difference. First operand 113 states and 162 transitions. Second operand 18 states. [2020-07-21 15:45:16,371 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 15:45:32,990 WARN L193 SmtUtils]: Spent 14.53 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 15:45:46,029 WARN L193 SmtUtils]: Spent 8.31 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 15:45:54,465 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 15:46:07,040 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 15:46:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:15,833 INFO L93 Difference]: Finished difference Result 282 states and 421 transitions. [2020-07-21 15:46:15,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 15:46:15,841 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-07-21 15:46:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:15,845 INFO L225 Difference]: With dead ends: 282 [2020-07-21 15:46:15,845 INFO L226 Difference]: Without dead ends: 179 [2020-07-21 15:46:15,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 63.5s TimeCoverageRelationStatistics Valid=314, Invalid=605, Unknown=11, NotChecked=0, Total=930 [2020-07-21 15:46:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-07-21 15:46:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 123. [2020-07-21 15:46:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-21 15:46:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 179 transitions. [2020-07-21 15:46:15,875 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 179 transitions. Word has length 72 [2020-07-21 15:46:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:15,878 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 179 transitions. [2020-07-21 15:46:15,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 15:46:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 179 transitions. [2020-07-21 15:46:15,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-21 15:46:15,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:15,880 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:16,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:16,095 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1326090124, now seen corresponding path program 1 times [2020-07-21 15:46:16,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:16,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809339082] [2020-07-21 15:46:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:16,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:46:16,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 15:46:16,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:46:16,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:46:16,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809339082] [2020-07-21 15:46:16,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:16,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 15:46:16,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407780318] [2020-07-21 15:46:16,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 15:46:16,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 15:46:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:46:16,854 INFO L87 Difference]: Start difference. First operand 123 states and 179 transitions. Second operand 26 states. [2020-07-21 15:46:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:46:17,254 INFO L93 Difference]: Finished difference Result 379 states and 579 transitions. [2020-07-21 15:46:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 15:46:17,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2020-07-21 15:46:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:46:17,262 INFO L225 Difference]: With dead ends: 379 [2020-07-21 15:46:17,262 INFO L226 Difference]: Without dead ends: 266 [2020-07-21 15:46:17,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:46:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-21 15:46:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 149. [2020-07-21 15:46:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 15:46:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 222 transitions. [2020-07-21 15:46:17,290 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 222 transitions. Word has length 85 [2020-07-21 15:46:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:46:17,291 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 222 transitions. [2020-07-21 15:46:17,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 15:46:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 222 transitions. [2020-07-21 15:46:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 15:46:17,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:46:17,293 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:46:17,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:17,507 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:46:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:46:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1670472676, now seen corresponding path program 2 times [2020-07-21 15:46:17,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:46:17,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657423856] [2020-07-21 15:46:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:46:17,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:46:17,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:46:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 15:46:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:46:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:46:17,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:46:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:46:18,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657423856] [2020-07-21 15:46:18,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:46:18,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 15:46:18,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631473684] [2020-07-21 15:46:18,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 15:46:18,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:46:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 15:46:18,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 15:46:18,897 INFO L87 Difference]: Start difference. First operand 149 states and 222 transitions. Second operand 34 states. [2020-07-21 15:46:45,525 WARN L193 SmtUtils]: Spent 17.76 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 15:47:07,112 WARN L193 SmtUtils]: Spent 8.50 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 15:47:20,651 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 15:47:44,336 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 15:48:07,868 WARN L193 SmtUtils]: Spent 10.49 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 15:48:37,325 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 15:48:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:58,501 INFO L93 Difference]: Finished difference Result 386 states and 587 transitions. [2020-07-21 15:48:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 15:48:58,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 96 [2020-07-21 15:48:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:58,511 INFO L225 Difference]: With dead ends: 386 [2020-07-21 15:48:58,512 INFO L226 Difference]: Without dead ends: 247 [2020-07-21 15:48:58,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 152.8s TimeCoverageRelationStatistics Valid=918, Invalid=2236, Unknown=38, NotChecked=0, Total=3192 [2020-07-21 15:48:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-21 15:48:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 153. [2020-07-21 15:48:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-21 15:48:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 229 transitions. [2020-07-21 15:48:58,541 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 229 transitions. Word has length 96 [2020-07-21 15:48:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:58,541 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 229 transitions. [2020-07-21 15:48:58,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 15:48:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 229 transitions. [2020-07-21 15:48:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 15:48:58,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:58,545 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:58,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:58,759 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:58,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1931980236, now seen corresponding path program 2 times [2020-07-21 15:48:58,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:58,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285966534] [2020-07-21 15:48:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:58,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:48:58,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:58,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 15:48:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 24 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 15:48:59,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 15:49:02,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285966534] [2020-07-21 15:49:02,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:02,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 15:49:02,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598329563] [2020-07-21 15:49:02,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 15:49:02,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 15:49:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 15:49:02,090 INFO L87 Difference]: Start difference. First operand 153 states and 229 transitions. Second operand 50 states. [2020-07-21 15:49:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:04,164 INFO L93 Difference]: Finished difference Result 613 states and 967 transitions. [2020-07-21 15:49:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 15:49:04,166 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 121 [2020-07-21 15:49:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:04,172 INFO L225 Difference]: With dead ends: 613 [2020-07-21 15:49:04,173 INFO L226 Difference]: Without dead ends: 470 [2020-07-21 15:49:04,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 15:49:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-07-21 15:49:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 221. [2020-07-21 15:49:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 342 transitions. [2020-07-21 15:49:04,231 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 342 transitions. Word has length 121 [2020-07-21 15:49:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:04,232 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 342 transitions. [2020-07-21 15:49:04,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 15:49:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 342 transitions. [2020-07-21 15:49:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 15:49:04,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:04,236 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:04,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:04,451 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:04,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 3 times [2020-07-21 15:49:04,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:04,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371764818] [2020-07-21 15:49:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:04,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:49:04,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 15:49:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 15:49:04,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:04,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371764818] [2020-07-21 15:49:04,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:04,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:49:04,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392293008] [2020-07-21 15:49:04,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:49:04,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:04,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:49:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:49:04,659 INFO L87 Difference]: Start difference. First operand 221 states and 342 transitions. Second operand 6 states. [2020-07-21 15:49:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:04,732 INFO L93 Difference]: Finished difference Result 227 states and 347 transitions. [2020-07-21 15:49:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:49:04,733 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 15:49:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:04,737 INFO L225 Difference]: With dead ends: 227 [2020-07-21 15:49:04,737 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 15:49:04,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 15:49:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 15:49:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-21 15:49:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 341 transitions. [2020-07-21 15:49:04,766 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 341 transitions. Word has length 126 [2020-07-21 15:49:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:04,767 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 341 transitions. [2020-07-21 15:49:04,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:49:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 341 transitions. [2020-07-21 15:49:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 15:49:04,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:04,770 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:04,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:04,985 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-07-21 15:49:04,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:04,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120221800] [2020-07-21 15:49:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:05,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:05,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:05,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 15:49:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-07-21 15:49:05,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:05,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120221800] [2020-07-21 15:49:05,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:05,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 15:49:05,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472044161] [2020-07-21 15:49:05,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:49:05,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:05,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:49:05,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:49:05,183 INFO L87 Difference]: Start difference. First operand 221 states and 341 transitions. Second operand 6 states. [2020-07-21 15:49:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:05,261 INFO L93 Difference]: Finished difference Result 234 states and 353 transitions. [2020-07-21 15:49:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:49:05,263 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-07-21 15:49:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:05,265 INFO L225 Difference]: With dead ends: 234 [2020-07-21 15:49:05,266 INFO L226 Difference]: Without dead ends: 210 [2020-07-21 15:49:05,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 15:49:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-21 15:49:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2020-07-21 15:49:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-21 15:49:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 318 transitions. [2020-07-21 15:49:05,297 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 318 transitions. Word has length 126 [2020-07-21 15:49:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:05,298 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 318 transitions. [2020-07-21 15:49:05,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:49:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 318 transitions. [2020-07-21 15:49:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-07-21 15:49:05,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:05,302 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:05,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:05,517 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:05,518 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-07-21 15:49:05,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:05,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627891283] [2020-07-21 15:49:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:05,591 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:05,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 15:49:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 15:49:05,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-07-21 15:49:06,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627891283] [2020-07-21 15:49:06,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:06,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 15:49:06,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467452161] [2020-07-21 15:49:06,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 15:49:06,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 15:49:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:49:06,239 INFO L87 Difference]: Start difference. First operand 209 states and 318 transitions. Second operand 15 states. [2020-07-21 15:49:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:06,677 INFO L93 Difference]: Finished difference Result 231 states and 345 transitions. [2020-07-21 15:49:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:49:06,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 131 [2020-07-21 15:49:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:06,684 INFO L225 Difference]: With dead ends: 231 [2020-07-21 15:49:06,685 INFO L226 Difference]: Without dead ends: 211 [2020-07-21 15:49:06,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:49:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-21 15:49:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2020-07-21 15:49:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 15:49:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 260 transitions. [2020-07-21 15:49:06,724 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 260 transitions. Word has length 131 [2020-07-21 15:49:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:06,725 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 260 transitions. [2020-07-21 15:49:06,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 15:49:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 260 transitions. [2020-07-21 15:49:06,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:06,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:06,728 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:06,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:06,942 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1401252570, now seen corresponding path program 1 times [2020-07-21 15:49:06,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:06,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493161339] [2020-07-21 15:49:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:07,024 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:07,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:07,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 15:49:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-07-21 15:49:07,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:07,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493161339] [2020-07-21 15:49:07,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:07,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-21 15:49:07,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697932566] [2020-07-21 15:49:07,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:49:07,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:49:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-21 15:49:07,298 INFO L87 Difference]: Start difference. First operand 201 states and 260 transitions. Second operand 10 states. [2020-07-21 15:49:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:07,661 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2020-07-21 15:49:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:49:07,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 15:49:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:07,666 INFO L225 Difference]: With dead ends: 248 [2020-07-21 15:49:07,666 INFO L226 Difference]: Without dead ends: 238 [2020-07-21 15:49:07,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:49:07,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-07-21 15:49:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 221. [2020-07-21 15:49:07,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 290 transitions. [2020-07-21 15:49:07,689 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 290 transitions. Word has length 135 [2020-07-21 15:49:07,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:07,690 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 290 transitions. [2020-07-21 15:49:07,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:49:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 290 transitions. [2020-07-21 15:49:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:07,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:07,692 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:07,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:07,907 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:07,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1613851048, now seen corresponding path program 1 times [2020-07-21 15:49:07,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:07,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371833679] [2020-07-21 15:49:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:08,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:49:08,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:08,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:49:08,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-07-21 15:49:08,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:49:08,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371833679] [2020-07-21 15:49:08,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:49:08,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:49:08,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401200216] [2020-07-21 15:49:08,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:49:08,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:49:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:49:08,078 INFO L87 Difference]: Start difference. First operand 221 states and 290 transitions. Second operand 4 states. [2020-07-21 15:49:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:08,126 INFO L93 Difference]: Finished difference Result 235 states and 306 transitions. [2020-07-21 15:49:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:49:08,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-07-21 15:49:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:08,130 INFO L225 Difference]: With dead ends: 235 [2020-07-21 15:49:08,130 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 15:49:08,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:49:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 15:49:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-21 15:49:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:49:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 288 transitions. [2020-07-21 15:49:08,155 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 288 transitions. Word has length 135 [2020-07-21 15:49:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:08,157 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 288 transitions. [2020-07-21 15:49:08,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:49:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 288 transitions. [2020-07-21 15:49:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:08,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:08,161 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:08,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:08,374 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 1 times [2020-07-21 15:49:08,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:08,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31972531] [2020-07-21 15:49:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:08,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:49:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:08,746 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 15:49:08,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:09,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31972531] [2020-07-21 15:49:09,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:49:09,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-21 15:49:09,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357155808] [2020-07-21 15:49:09,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:49:09,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:49:09,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:49:09,065 INFO L87 Difference]: Start difference. First operand 221 states and 288 transitions. Second operand 11 states. [2020-07-21 15:49:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:09,608 INFO L93 Difference]: Finished difference Result 241 states and 308 transitions. [2020-07-21 15:49:09,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:49:09,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-07-21 15:49:09,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:09,616 INFO L225 Difference]: With dead ends: 241 [2020-07-21 15:49:09,616 INFO L226 Difference]: Without dead ends: 220 [2020-07-21 15:49:09,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:49:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-21 15:49:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 204. [2020-07-21 15:49:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 15:49:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 262 transitions. [2020-07-21 15:49:09,645 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 262 transitions. Word has length 135 [2020-07-21 15:49:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:09,647 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 262 transitions. [2020-07-21 15:49:09,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:49:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 262 transitions. [2020-07-21 15:49:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:09,649 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:09,650 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:09,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:09,864 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:09,865 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-07-21 15:49:09,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:09,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306670035] [2020-07-21 15:49:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:10,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 15:49:10,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 15:49:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:11,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306670035] [2020-07-21 15:49:11,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:49:11,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 15:49:11,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124098765] [2020-07-21 15:49:11,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:49:11,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:11,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:49:11,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:49:11,119 INFO L87 Difference]: Start difference. First operand 204 states and 262 transitions. Second operand 10 states. [2020-07-21 15:49:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:11,571 INFO L93 Difference]: Finished difference Result 224 states and 285 transitions. [2020-07-21 15:49:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:49:11,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 15:49:11,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:11,580 INFO L225 Difference]: With dead ends: 224 [2020-07-21 15:49:11,580 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 15:49:11,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:49:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 15:49:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-07-21 15:49:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-21 15:49:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2020-07-21 15:49:11,610 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 135 [2020-07-21 15:49:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:11,611 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2020-07-21 15:49:11,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:49:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2020-07-21 15:49:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:11,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:11,614 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:11,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:11,821 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-07-21 15:49:11,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:11,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142039459] [2020-07-21 15:49:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:11,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:11,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 15:49:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 15:49:12,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:13,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142039459] [2020-07-21 15:49:13,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:49:13,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-21 15:49:13,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092951009] [2020-07-21 15:49:13,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 15:49:13,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 15:49:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:49:13,905 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand 14 states. [2020-07-21 15:49:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:14,954 INFO L93 Difference]: Finished difference Result 219 states and 276 transitions. [2020-07-21 15:49:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 15:49:14,957 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-07-21 15:49:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:14,959 INFO L225 Difference]: With dead ends: 219 [2020-07-21 15:49:14,959 INFO L226 Difference]: Without dead ends: 201 [2020-07-21 15:49:14,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:49:14,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-21 15:49:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-07-21 15:49:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 15:49:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 257 transitions. [2020-07-21 15:49:14,979 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 257 transitions. Word has length 135 [2020-07-21 15:49:14,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:14,980 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 257 transitions. [2020-07-21 15:49:14,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 15:49:14,980 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 257 transitions. [2020-07-21 15:49:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 15:49:14,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:14,982 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:15,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:15,190 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:15,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:15,190 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-07-21 15:49:15,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:15,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859381063] [2020-07-21 15:49:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:15,359 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:15,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:15,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:49:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-07-21 15:49:15,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:16,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859381063] [2020-07-21 15:49:16,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 15:49:16,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 15:49:16,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256795844] [2020-07-21 15:49:16,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 15:49:16,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 15:49:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:49:16,358 INFO L87 Difference]: Start difference. First operand 201 states and 257 transitions. Second operand 10 states. [2020-07-21 15:49:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:16,590 INFO L93 Difference]: Finished difference Result 201 states and 257 transitions. [2020-07-21 15:49:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:49:16,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 15:49:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:16,591 INFO L225 Difference]: With dead ends: 201 [2020-07-21 15:49:16,591 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 15:49:16,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:49:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 15:49:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 15:49:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 15:49:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 15:49:16,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 15:49:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:16,593 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 15:49:16,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 15:49:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 15:49:16,594 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 15:49:16,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:16,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 15:49:17,340 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 354 [2020-07-21 15:49:17,456 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 353 [2020-07-21 15:49:17,575 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 353 [2020-07-21 15:49:17,717 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 353 [2020-07-21 15:49:18,001 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2020-07-21 15:49:18,182 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2020-07-21 15:49:19,469 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 224 DAG size of output: 38 [2020-07-21 15:49:21,200 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 900 DAG size of output: 20 [2020-07-21 15:49:21,211 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 15:49:21,212 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:49:21,212 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 15:49:21,212 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 15:49:21,212 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (or (and (= 0 base2flt_~__retres4~0) (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2020-07-21 15:49:21,212 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 15:49:21,212 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 15:49:21,212 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (or (< (mod base2flt_~m 4294967296) 16777216) (not (= 1 |base2flt_#in~m|))) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 15:49:21,213 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 15:49:21,214 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 15:49:21,214 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 15:49:21,214 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 15:49:21,214 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 15:49:21,214 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 15:49:21,214 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= 0 mulflt_~__retres10~1)) (.cse0 (= mulflt_~b |mulflt_#in~b|))) (and (or (and .cse0 .cse1) (exists ((v_mulflt_~a_26 Int)) (< (mod v_mulflt_~a_26 4294967296) (mod |mulflt_#in~b| 4294967296)))) (or (and (< (mod |mulflt_#in~a| 4294967296) (mod |mulflt_#in~b| 4294967296)) (= mulflt_~b |mulflt_#in~a|) (not (= 0 (mod |mulflt_#in~a| 4294967296)))) .cse1 (and (= mulflt_~a |mulflt_#in~a|) .cse0 (<= (mod mulflt_~b 4294967296) (mod |mulflt_#in~a| 4294967296)))))) [2020-07-21 15:49:21,214 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 15:49:21,214 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 15:49:21,214 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 15:49:21,214 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 15:49:21,214 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 15:49:21,215 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 15:49:21,216 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 15:49:21,216 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 15:49:21,216 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 15:49:21,216 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 15:49:21,216 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 15:49:21,216 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 15:49:21,216 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-21 15:49:21,216 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 15:49:21,216 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 15:49:21,217 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (= 0 main_~b~0)) (and .cse0 (<= (mod main_~a~0 4294967296) 0)) (and .cse0 (<= 1 main_~sa~0) (<= 1 main_~tmp~2)))) [2020-07-21 15:49:21,217 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 15:49:21,217 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 15:49:21,217 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 15:49:21,217 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 15:49:21,217 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 15:49:21,217 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 15:49:21,218 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 15:49:21,218 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 15:49:21,218 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 15:49:21,218 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 15:49:21,219 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 15:49:21,219 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 15:49:21,219 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 15:49:21,219 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 15:49:21,219 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 15:49:21,219 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 15:49:21,219 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 15:49:21,220 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 15:49:21,220 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 15:49:21,220 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 15:49:21,220 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 15:49:21,220 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 15:49:21,249 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_26,QUANTIFIED] [2020-07-21 15:49:21,251 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_26,QUANTIFIED] [2020-07-21 15:49:21,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 03:49:21 BoogieIcfgContainer [2020-07-21 15:49:21,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 15:49:21,260 INFO L168 Benchmark]: Toolchain (without parser) took 265412.10 ms. Allocated memory was 145.8 MB in the beginning and 277.9 MB in the end (delta: 132.1 MB). Free memory was 102.7 MB in the beginning and 199.6 MB in the end (delta: -96.9 MB). Peak memory consumption was 167.2 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:21,260 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 15:49:21,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.80 ms. Allocated memory is still 145.8 MB. Free memory was 102.3 MB in the beginning and 89.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:21,261 INFO L168 Benchmark]: Boogie Preprocessor took 126.74 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 89.3 MB in the beginning and 180.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:21,262 INFO L168 Benchmark]: RCFGBuilder took 548.35 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 155.2 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:21,262 INFO L168 Benchmark]: TraceAbstraction took 264372.80 ms. Allocated memory was 202.9 MB in the beginning and 277.9 MB in the end (delta: 75.0 MB). Free memory was 154.5 MB in the beginning and 199.6 MB in the end (delta: -45.1 MB). Peak memory consumption was 161.8 MB. Max. memory is 7.1 GB. [2020-07-21 15:49:21,264 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 120.7 MB in the beginning and 120.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 356.80 ms. Allocated memory is still 145.8 MB. Free memory was 102.3 MB in the beginning and 89.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.74 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 89.3 MB in the beginning and 180.2 MB in the end (delta: -91.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 548.35 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 155.2 MB in the end (delta: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264372.80 ms. Allocated memory was 202.9 MB in the beginning and 277.9 MB in the end (delta: 75.0 MB). Free memory was 154.5 MB in the beginning and 199.6 MB in the end (delta: -45.1 MB). Peak memory consumption was 161.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_26,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_26,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((0 == __retres4 && \old(e) <= e) && m == \old(m)) && e <= \old(e)) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 15:49:21,272 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_26,QUANTIFIED] [2020-07-21 15:49:21,275 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_26,QUANTIFIED] Derived loop invariant: ((b == \old(b) && 0 == __retres10) || (\exists v_mulflt_~a_26 : int :: v_mulflt_~a_26 % 4294967296 < \old(b) % 4294967296)) && ((((\old(a) % 4294967296 < \old(b) % 4294967296 && b == \old(a)) && !(0 == \old(a) % 4294967296)) || 0 == __retres10) || ((a == \old(a) && b == \old(b)) && b % 4294967296 <= \old(a) % 4294967296)) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (!(\old(m) % 4294967296 <= 0) && (m % 4294967296 < 16777216 || !(1 == \old(m)))) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 259.8s, OverallIterations: 24, TraceHistogramMax: 24, AutomataDifference: 239.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1664 SDtfs, 2989 SDslu, 9088 SDs, 0 SdLazy, 3778 SolverSat, 467 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 11.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3172 GetRequests, 2773 SyntacticMatches, 22 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 234.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 24 MinimizatonAttempts, 731 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 338 PreInvPairs, 914 NumberOfFragments, 158 HoareAnnotationTreeSize, 338 FomulaSimplifications, 8303 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 11257 FormulaSimplificationTreeSizeReductionInter, 3.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 2200 NumberOfCodeBlocks, 1406 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 2858 ConstructedInterpolants, 8 QuantifiedInterpolants, 631384 SizeOfPredicates, 58 NumberOfNonLiveVariables, 4740 ConjunctsInSsa, 304 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 9221/11807 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...