/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 13:06:22,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:06:22,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:06:22,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:06:22,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:06:22,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:06:22,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:06:22,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:06:22,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:06:22,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:06:22,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:06:22,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:06:22,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:06:22,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:06:22,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:06:22,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:06:22,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:06:22,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:06:22,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:06:22,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:06:22,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:06:22,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:06:22,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:06:22,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:06:22,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:06:22,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:06:22,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:06:22,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:06:22,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:06:22,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:06:22,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:06:22,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:06:22,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:06:22,761 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:06:22,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:06:22,761 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:06:22,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:06:22,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:06:22,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:06:22,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:06:22,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:06:22,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:06:22,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:06:22,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:06:22,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:06:22,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:06:22,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:06:22,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:06:22,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:06:22,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:06:22,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:22,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:06:22,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:06:22,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:06:22,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:06:22,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:22,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:06:22,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:06:22,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:06:23,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:06:23,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:06:23,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:06:23,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:06:23,080 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:06:23,081 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-20 13:06:23,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00235a0d3/1b8971173e5f4e3dbf19b63361a6be94/FLAG54aef4ff1 [2020-07-20 13:06:23,629 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:06:23,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-20 13:06:23,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00235a0d3/1b8971173e5f4e3dbf19b63361a6be94/FLAG54aef4ff1 [2020-07-20 13:06:24,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00235a0d3/1b8971173e5f4e3dbf19b63361a6be94 [2020-07-20 13:06:24,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:06:24,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:06:24,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:24,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:06:24,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:06:24,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9860d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24, skipping insertion in model container [2020-07-20 13:06:24,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:06:24,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:06:24,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:24,265 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:06:24,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:06:24,300 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:06:24,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24 WrapperNode [2020-07-20 13:06:24,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:06:24,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:06:24,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:06:24,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:06:24,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... [2020-07-20 13:06:24,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:06:24,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:06:24,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:06:24,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:06:24,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:06:24,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:06:24,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:06:24,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 13:06:24,486 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-07-20 13:06:24,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:06:24,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:06:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:06:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 13:06:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-07-20 13:06:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:06:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:06:24,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:06:24,685 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:06:24,686 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 13:06:24,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:24 BoogieIcfgContainer [2020-07-20 13:06:24,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:06:24,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:06:24,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:06:24,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:06:24,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:06:24" (1/3) ... [2020-07-20 13:06:24,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a326662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:24, skipping insertion in model container [2020-07-20 13:06:24,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:06:24" (2/3) ... [2020-07-20 13:06:24,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a326662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:06:24, skipping insertion in model container [2020-07-20 13:06:24,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:06:24" (3/3) ... [2020-07-20 13:06:24,699 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-07-20 13:06:24,709 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:06:24,717 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:06:24,728 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:06:24,752 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:06:24,752 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:06:24,752 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:06:24,752 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:06:24,753 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:06:24,753 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:06:24,753 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:06:24,753 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:06:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-20 13:06:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:06:24,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:24,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:24,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-07-20 13:06:24,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:24,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923987158] [2020-07-20 13:06:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:24,881 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:24,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 13:06:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:24,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:24,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923987158] [2020-07-20 13:06:24,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:24,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 13:06:24,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438616950] [2020-07-20 13:06:25,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 13:06:25,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 13:06:25,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:06:25,059 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-07-20 13:06:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:25,142 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-07-20 13:06:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 13:06:25,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 13:06:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:25,160 INFO L225 Difference]: With dead ends: 55 [2020-07-20 13:06:25,161 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 13:06:25,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 13:06:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 13:06:25,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-20 13:06:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 13:06:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-07-20 13:06:25,238 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-07-20 13:06:25,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:25,238 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-07-20 13:06:25,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 13:06:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-07-20 13:06:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 13:06:25,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:25,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:25,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:25,453 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-07-20 13:06:25,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:25,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961196090] [2020-07-20 13:06:25,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:25,502 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:25,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:06:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:25,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:25,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961196090] [2020-07-20 13:06:25,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:25,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:06:25,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636200011] [2020-07-20 13:06:25,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:25,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:25,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:25,548 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-07-20 13:06:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:25,641 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-20 13:06:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:25,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-20 13:06:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:25,643 INFO L225 Difference]: With dead ends: 47 [2020-07-20 13:06:25,644 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:06:25,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:06:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:06:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-20 13:06:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 13:06:25,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-20 13:06:25,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-07-20 13:06:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:25,654 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-20 13:06:25,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-20 13:06:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:06:25,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:25,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:25,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:25,870 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:25,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:25,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1158269966, now seen corresponding path program 1 times [2020-07-20 13:06:25,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:25,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934471970] [2020-07-20 13:06:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:25,918 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:06:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:25,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:25,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934471970] [2020-07-20 13:06:25,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:25,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:06:25,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447189024] [2020-07-20 13:06:25,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:25,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:25,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:25,954 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-07-20 13:06:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:26,019 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-20 13:06:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:26,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 13:06:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:26,021 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:06:26,021 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 13:06:26,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:06:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 13:06:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-20 13:06:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 13:06:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-20 13:06:26,029 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-20 13:06:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:26,029 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-20 13:06:26,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-20 13:06:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 13:06:26,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:26,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:26,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:26,244 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:26,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:26,245 INFO L82 PathProgramCache]: Analyzing trace with hash -457205388, now seen corresponding path program 1 times [2020-07-20 13:06:26,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:26,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675072525] [2020-07-20 13:06:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:26,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:06:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:06:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:26,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:06:26,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675072525] [2020-07-20 13:06:26,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:06:26,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:06:26,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054501681] [2020-07-20 13:06:26,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:26,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:06:26,319 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-20 13:06:26,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:26,366 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 13:06:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:26,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-20 13:06:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:26,368 INFO L225 Difference]: With dead ends: 40 [2020-07-20 13:06:26,368 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 13:06:26,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 13:06:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 13:06:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 13:06:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 13:06:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 13:06:26,375 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-07-20 13:06:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:26,376 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 13:06:26,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 13:06:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 13:06:26,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:26,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:26,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:26,585 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1431348209, now seen corresponding path program 1 times [2020-07-20 13:06:26,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:26,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382488800] [2020-07-20 13:06:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:26,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 13:06:26,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 13:06:26,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:26,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:26,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382488800] [2020-07-20 13:06:26,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:06:26,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-07-20 13:06:26,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653284008] [2020-07-20 13:06:26,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:06:26,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:26,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:06:26,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:06:26,782 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-20 13:06:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:26,818 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-20 13:06:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:06:26,818 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 13:06:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:26,820 INFO L225 Difference]: With dead ends: 44 [2020-07-20 13:06:26,820 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 13:06:26,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 13:06:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 13:06:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 13:06:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 13:06:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-20 13:06:26,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-07-20 13:06:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:26,827 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-20 13:06:26,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:06:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-20 13:06:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 13:06:26,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:26,829 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:27,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:27,031 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1537894100, now seen corresponding path program 1 times [2020-07-20 13:06:27,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:27,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128717043] [2020-07-20 13:06:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:27,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:27,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:06:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:27,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:27,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128717043] [2020-07-20 13:06:27,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:06:27,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 13:06:27,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129600316] [2020-07-20 13:06:27,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:06:27,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:27,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:06:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:06:27,481 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2020-07-20 13:06:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:27,615 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-07-20 13:06:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:06:27,620 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-07-20 13:06:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:27,621 INFO L225 Difference]: With dead ends: 46 [2020-07-20 13:06:27,621 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 13:06:27,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:06:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 13:06:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-20 13:06:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 13:06:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-20 13:06:27,632 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-07-20 13:06:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:27,632 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-20 13:06:27,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:06:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-20 13:06:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 13:06:27,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:27,634 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:27,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:27,849 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash -849280247, now seen corresponding path program 2 times [2020-07-20 13:06:27,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:27,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014351557] [2020-07-20 13:06:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:27,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 13:06:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 13:06:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:27,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:28,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014351557] [2020-07-20 13:06:28,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:06:28,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-20 13:06:28,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158168438] [2020-07-20 13:06:28,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 13:06:28,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 13:06:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 13:06:28,089 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-07-20 13:06:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:28,237 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 13:06:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:06:28,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-07-20 13:06:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:28,239 INFO L225 Difference]: With dead ends: 48 [2020-07-20 13:06:28,239 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 13:06:28,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:06:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 13:06:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 13:06:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 13:06:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-20 13:06:28,246 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2020-07-20 13:06:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:28,247 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-20 13:06:28,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 13:06:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-20 13:06:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:06:28,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:28,248 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:28,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:28,463 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash -516331098, now seen corresponding path program 3 times [2020-07-20 13:06:28,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:28,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373607044] [2020-07-20 13:06:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:28,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:06:28,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:28,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 13:06:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:28,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:28,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373607044] [2020-07-20 13:06:28,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 13:06:28,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 13:06:28,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922580748] [2020-07-20 13:06:28,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:06:28,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:06:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:06:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 13:06:28,839 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-07-20 13:06:41,523 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 13:06:43,587 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 13:06:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:06:47,735 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-07-20 13:06:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:06:47,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 13:06:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:06:47,743 INFO L225 Difference]: With dead ends: 52 [2020-07-20 13:06:47,744 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 13:06:47,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-20 13:06:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 13:06:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 13:06:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:06:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 13:06:47,751 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-07-20 13:06:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:06:47,754 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 13:06:47,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:06:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 13:06:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 13:06:47,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:06:47,755 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:06:47,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:47,956 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:06:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:06:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1878386625, now seen corresponding path program 4 times [2020-07-20 13:06:47,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:06:47,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918820482] [2020-07-20 13:06:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:06:48,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:06:48,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:06:48,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 13:06:48,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:06:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:06:48,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:06:48,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:48,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:48,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:48,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:48,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:48,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:48,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:06:48,556 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 5 [2020-07-20 13:06:52,042 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 13:06:52,948 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 13:06:54,399 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 13:06:57,686 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 13:07:00,175 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 13:07:06,684 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 13:07:14,192 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 13:07:24,228 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 13:07:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:07:24,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918820482] [2020-07-20 13:07:24,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:07:24,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-20 13:07:24,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930128974] [2020-07-20 13:07:24,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 13:07:24,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:07:24,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 13:07:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=547, Unknown=4, NotChecked=0, Total=650 [2020-07-20 13:07:24,592 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 26 states. [2020-07-20 13:07:41,143 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 c_gcd_test_~a)) (.cse2 (= 0 (mod |c_gcd_test_#in~a| c_gcd_test_~a))) (.cse1 (and (not (= 0 (mod |c_gcd_test_#in~a| (div |c_gcd_test_#in~a| 7)))) (= 0 (mod |c_gcd_test_#in~a| 7))))) (and (or (= (mod |c_gcd_test_#in~a| (+ (* c_gcd_test_~b (- 2)) c_gcd_test_~a)) 0) (not (= (* 5 c_gcd_test_~b) .cse0)) .cse1) (or (not (= .cse0 c_gcd_test_~b)) .cse2 .cse1) (or (= 0 (mod |c_gcd_test_#in~a| (+ (* c_gcd_test_~b (- 1)) c_gcd_test_~a))) (not (= (* 3 c_gcd_test_~b) .cse0)) .cse1) (or .cse2 (not (= c_gcd_test_~b 0)) .cse1) (or .cse2 (not (= c_gcd_test_~b c_gcd_test_~a)) .cse1))) is different from false [2020-07-20 13:08:37,390 WARN L193 SmtUtils]: Spent 20.65 s on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 13:09:23,300 WARN L193 SmtUtils]: Spent 10.99 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 13:09:45,583 WARN L193 SmtUtils]: Spent 7.43 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 13:10:43,017 WARN L193 SmtUtils]: Spent 20.29 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 13:10:53,552 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 c_gcd_test_~a)) (.cse2 (= 0 (mod |c_gcd_test_#in~a| c_gcd_test_~a))) (.cse1 (and (not (= 0 (mod |c_gcd_test_#in~a| (div |c_gcd_test_#in~a| 7)))) (= 0 (mod |c_gcd_test_#in~a| 7))))) (and (or (= (mod |c_gcd_test_#in~a| (+ (* c_gcd_test_~b (- 2)) c_gcd_test_~a)) 0) (not (= (* 5 c_gcd_test_~b) .cse0)) .cse1) (or (= 0 (mod |c_gcd_test_#in~a| (+ (* c_gcd_test_~b (- 1)) c_gcd_test_~a))) (not (= (* 3 c_gcd_test_~b) .cse0)) .cse1) (or .cse2 (not (= c_gcd_test_~b 0)) .cse1) (or .cse2 (not (= c_gcd_test_~b c_gcd_test_~a)) .cse1))) is different from false [2020-07-20 13:11:57,073 WARN L193 SmtUtils]: Spent 18.11 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 13:12:03,731 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 c_gcd_test_~a)) (.cse1 (and (not (= 0 (mod |c_gcd_test_#in~a| (div |c_gcd_test_#in~a| 7)))) (= 0 (mod |c_gcd_test_#in~a| 7))))) (and (or (= (mod |c_gcd_test_#in~a| (+ (* c_gcd_test_~b (- 2)) c_gcd_test_~a)) 0) (not (= (* 5 c_gcd_test_~b) .cse0)) .cse1) (or (= 0 (mod |c_gcd_test_#in~a| c_gcd_test_~a)) .cse1) (or (= 0 (mod |c_gcd_test_#in~a| (+ (* c_gcd_test_~b (- 1)) c_gcd_test_~a))) (not (= (* 3 c_gcd_test_~b) .cse0)) .cse1))) is different from false [2020-07-20 13:13:11,110 WARN L193 SmtUtils]: Spent 26.66 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 13:14:41,370 WARN L193 SmtUtils]: Spent 31.90 s on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 13:16:28,016 WARN L193 SmtUtils]: Spent 11.97 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 13:17:29,714 WARN L193 SmtUtils]: Spent 17.05 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 13:18:06,693 WARN L193 SmtUtils]: Spent 2.67 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 13:18:34,072 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-20 13:19:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:19:11,695 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2020-07-20 13:19:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 13:19:11,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-07-20 13:19:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:19:11,803 INFO L225 Difference]: With dead ends: 83 [2020-07-20 13:19:11,803 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 13:19:11,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 582.2s TimeCoverageRelationStatistics Valid=247, Invalid=1246, Unknown=79, NotChecked=234, Total=1806 [2020-07-20 13:19:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 13:19:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-20 13:19:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 13:19:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2020-07-20 13:19:11,823 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 29 [2020-07-20 13:19:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:19:11,823 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2020-07-20 13:19:11,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 13:19:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2020-07-20 13:19:11,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 13:19:11,825 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:19:11,825 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:19:12,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:12,029 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:19:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:19:12,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1492674782, now seen corresponding path program 5 times [2020-07-20 13:19:12,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:19:12,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965893675] [2020-07-20 13:19:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:12,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:19:12,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:19:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 13:19:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:19:12,516 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 13:19:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:19:13,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:19:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:19:15,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965893675] [2020-07-20 13:19:15,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:19:15,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-07-20 13:19:15,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290208770] [2020-07-20 13:19:15,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:19:15,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:19:15,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:19:15,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:19:15,850 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand 17 states. [2020-07-20 13:19:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:19:16,942 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2020-07-20 13:19:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:19:16,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-07-20 13:19:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:19:16,968 INFO L225 Difference]: With dead ends: 89 [2020-07-20 13:19:16,968 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 13:19:16,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-07-20 13:19:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 13:19:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 13:19:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 13:19:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2020-07-20 13:19:16,980 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 31 [2020-07-20 13:19:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:19:16,980 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2020-07-20 13:19:16,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:19:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2020-07-20 13:19:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 13:19:16,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:19:16,982 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-07-20 13:19:17,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:17,186 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:19:17,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:19:17,187 INFO L82 PathProgramCache]: Analyzing trace with hash -825201876, now seen corresponding path program 1 times [2020-07-20 13:19:17,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:19:17,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256150800] [2020-07-20 13:19:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:19:17,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 13:19:17,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:19:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 13:19:17,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:19:17,710 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 13:19:20,487 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 13:19:22,172 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-07-20 13:19:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:19:22,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:19:23,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:23,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:19:27,526 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 27 DAG size of output: 5 [2020-07-20 13:19:31,771 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-07-20 13:19:43,065 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 13:19:43,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:20:13,286 WARN L193 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 13:20:15,452 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_main_~y~0_BEFORE_CALL_15 Int)) (or (not (= 0 (mod v_main_~y~0_BEFORE_CALL_15 (div (- |c_gcd_test_#in~a|) (- 7))))) (= 0 (mod v_main_~y~0_BEFORE_CALL_15 |c_gcd_test_#res|)))) (or (forall ((v_prenex_1 Int)) (= 0 (mod v_prenex_1 |c_gcd_test_#res|))) (= 0 (mod (* |c_gcd_test_#in~a| 6) (- 7))))) is different from false [2020-07-20 13:20:42,865 WARN L193 SmtUtils]: Spent 7.28 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 13:21:00,790 WARN L193 SmtUtils]: Spent 5.20 s on a formula simplification that was a NOOP. DAG size: 28