/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:02:02,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:02:03,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:02:03,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:02:03,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:02:03,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:02:03,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:02:03,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:02:03,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:02:03,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:02:03,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:02:03,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:02:03,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:02:03,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:02:03,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:02:03,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:02:03,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:02:03,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:02:03,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:02:03,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:02:03,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:02:03,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:02:03,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:02:03,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:02:03,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:02:03,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:02:03,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:02:03,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:02:03,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:02:03,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-19 23:02:03,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:02:03,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:02:03,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:02:03,096 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 [2020-07-19 23:02:03,133 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:02:03,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:02:03,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:02:03,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:02:03,137 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:02:03,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:02:03,138 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:02:03,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:02:03,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:02:03,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:02:03,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:02:03,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:02:03,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:02:03,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:02:03,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:02:03,141 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:02:03,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:02:03,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:02:03,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:02:03,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:02:03,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:02:03,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:02:03,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:02:03,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:02:03,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:02:03,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:02:03,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:02:03,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:02:03,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:02:03,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:02:03,463 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:02:03,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:02:03,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:02:03,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:02:03,482 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:02:03,482 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-19 23:02:03,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab96134ea/cca7b79c9afb48a59fb0195f5b9197e4/FLAG4169ce9fe [2020-07-19 23:02:03,998 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:02:03,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c [2020-07-19 23:02:04,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab96134ea/cca7b79c9afb48a59fb0195f5b9197e4/FLAG4169ce9fe [2020-07-19 23:02:04,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab96134ea/cca7b79c9afb48a59fb0195f5b9197e4 [2020-07-19 23:02:04,400 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:02:04,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:02:04,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:04,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:02:04,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:02:04,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43933f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04, skipping insertion in model container [2020-07-19 23:02:04,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:02:04,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:02:04,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:04,609 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:02:04,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:02:04,639 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:02:04,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04 WrapperNode [2020-07-19 23:02:04,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:02:04,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:02:04,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:02:04,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:02:04,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (1/1) ... [2020-07-19 23:02:04,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:02:04,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:02:04,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:02:04,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:02:04,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (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 [2020-07-19 23:02:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:02:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:02:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:02:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd_test [2020-07-19 23:02:04,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:02:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:02:04,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:02:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:02:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure gcd_test [2020-07-19 23:02:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:02:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:02:04,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:02:05,016 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:02:05,017 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 23:02:05,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:05 BoogieIcfgContainer [2020-07-19 23:02:05,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:02:05,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:02:05,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:02:05,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:02:05,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:02:04" (1/3) ... [2020-07-19 23:02:05,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c2a1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:05, skipping insertion in model container [2020-07-19 23:02:05,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:02:04" (2/3) ... [2020-07-19 23:02:05,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c2a1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:02:05, skipping insertion in model container [2020-07-19 23:02:05,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:02:05" (3/3) ... [2020-07-19 23:02:05,031 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-07-19 23:02:05,042 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:02:05,050 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:02:05,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:02:05,141 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:02:05,141 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:02:05,141 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:02:05,142 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:02:05,142 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:02:05,142 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:02:05,142 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:02:05,142 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:02:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-19 23:02:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 23:02:05,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:05,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:05,194 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash 876608673, now seen corresponding path program 1 times [2020-07-19 23:02:05,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:05,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719366291] [2020-07-19 23:02:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:05,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719366291] [2020-07-19 23:02:05,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:05,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:02:05,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104053225] [2020-07-19 23:02:05,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:02:05,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:05,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:02:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:02:05,440 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-07-19 23:02:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:05,544 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-07-19 23:02:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:02:05,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-19 23:02:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:05,571 INFO L225 Difference]: With dead ends: 55 [2020-07-19 23:02:05,572 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 23:02:05,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:02:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 23:02:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-19 23:02:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:02:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-07-19 23:02:05,632 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-07-19 23:02:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:05,632 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-07-19 23:02:05,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:02:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-07-19 23:02:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 23:02:05,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:05,635 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:05,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:02:05,636 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash 483581663, now seen corresponding path program 1 times [2020-07-19 23:02:05,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:05,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911312147] [2020-07-19 23:02:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:05,653 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:05,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174639070] [2020-07-19 23:02:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3734b8ea No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:05,725 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3734b8ea issued 2 check-sat command(s) [2020-07-19 23:02:05,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 23:02:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:05,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911312147] [2020-07-19 23:02:05,799 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:05,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174639070] [2020-07-19 23:02:05,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:05,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:02:05,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663068875] [2020-07-19 23:02:05,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:02:05,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:05,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:02:05,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:05,804 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-07-19 23:02:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:05,876 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-07-19 23:02:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:02:05,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-19 23:02:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:05,879 INFO L225 Difference]: With dead ends: 47 [2020-07-19 23:02:05,879 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:02:05,880 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 [2020-07-19 23:02:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:02:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-19 23:02:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 23:02:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-19 23:02:05,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2020-07-19 23:02:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:05,889 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-19 23:02:05,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:02:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-19 23:02:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 23:02:05,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:05,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:06,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:02:06,109 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:06,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1158269966, now seen corresponding path program 1 times [2020-07-19 23:02:06,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:06,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800275033] [2020-07-19 23:02:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:06,127 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:06,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328949100] [2020-07-19 23:02:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f9e5b9d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:06,181 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f9e5b9d issued 2 check-sat command(s) [2020-07-19 23:02:06,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:06,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 23:02:06,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:06,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800275033] [2020-07-19 23:02:06,220 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:06,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328949100] [2020-07-19 23:02:06,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:06,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:02:06,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096914539] [2020-07-19 23:02:06,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:02:06,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:02:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:06,223 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-07-19 23:02:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:06,282 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-19 23:02:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:02:06,283 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-19 23:02:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:06,284 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:02:06,284 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:02:06,285 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 [2020-07-19 23:02:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:02:06,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-07-19 23:02:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 23:02:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-07-19 23:02:06,293 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2020-07-19 23:02:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:06,293 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-07-19 23:02:06,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:02:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-07-19 23:02:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 23:02:06,294 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:06,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:06,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:06,508 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash -457205388, now seen corresponding path program 1 times [2020-07-19 23:02:06,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:06,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326110446] [2020-07-19 23:02:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:06,524 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:06,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82630720] [2020-07-19 23:02:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bc6d732 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:06,586 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bc6d732 issued 3 check-sat command(s) [2020-07-19 23:02:06,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:06,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 23:02:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:06,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326110446] [2020-07-19 23:02:06,619 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:06,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82630720] [2020-07-19 23:02:06,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:06,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:02:06,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993212409] [2020-07-19 23:02:06,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:02:06,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:06,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:02:06,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:06,622 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-07-19 23:02:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:06,667 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-19 23:02:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:02:06,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-19 23:02:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:06,670 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:02:06,670 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 23:02:06,671 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 [2020-07-19 23:02:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 23:02:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 23:02:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:02:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-19 23:02:06,677 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-07-19 23:02:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:06,678 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-19 23:02:06,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:02:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-19 23:02:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 23:02:06,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:06,694 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] [2020-07-19 23:02:06,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:06,911 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:06,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1431348209, now seen corresponding path program 1 times [2020-07-19 23:02:06,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:06,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556339572] [2020-07-19 23:02:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:06,936 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:06,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124018510] [2020-07-19 23:02:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30fc58d9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:06,962 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@30fc58d9 issued 1 check-sat command(s) [2020-07-19 23:02:06,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:02:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:07,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556339572] [2020-07-19 23:02:07,015 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:07,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124018510] [2020-07-19 23:02:07,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:02:07,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-19 23:02:07,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608529524] [2020-07-19 23:02:07,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:02:07,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:07,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:02:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:07,019 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-07-19 23:02:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:07,066 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-07-19 23:02:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:02:07,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-19 23:02:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:07,070 INFO L225 Difference]: With dead ends: 44 [2020-07-19 23:02:07,071 INFO L226 Difference]: Without dead ends: 29 [2020-07-19 23:02:07,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:02:07,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-19 23:02:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-19 23:02:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:02:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-19 23:02:07,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-07-19 23:02:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:07,087 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-19 23:02:07,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:02:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-19 23:02:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-19 23:02:07,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:07,089 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] [2020-07-19 23:02:07,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:07,304 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1537894100, now seen corresponding path program 1 times [2020-07-19 23:02:07,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:07,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674397056] [2020-07-19 23:02:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:07,324 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:07,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676200370] [2020-07-19 23:02:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1fcc8984 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:07,361 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1fcc8984 issued 2 check-sat command(s) [2020-07-19 23:02:07,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:02:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:07,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674397056] [2020-07-19 23:02:07,441 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:07,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676200370] [2020-07-19 23:02:07,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:02:07,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-19 23:02:07,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128741555] [2020-07-19 23:02:07,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:02:07,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:07,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:02:07,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:02:07,443 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-07-19 23:02:07,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:07,506 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-07-19 23:02:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:02:07,507 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-19 23:02:07,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:07,508 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:02:07,508 INFO L226 Difference]: Without dead ends: 31 [2020-07-19 23:02:07,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:02:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-19 23:02:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-19 23:02:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:02:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-19 23:02:07,515 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-07-19 23:02:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:07,515 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-19 23:02:07,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:02:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-19 23:02:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 23:02:07,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:07,517 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] [2020-07-19 23:02:07,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:02:07,730 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:07,731 INFO L82 PathProgramCache]: Analyzing trace with hash -849280247, now seen corresponding path program 2 times [2020-07-19 23:02:07,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:07,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930758247] [2020-07-19 23:02:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:07,741 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:07,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112877042] [2020-07-19 23:02:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41133029 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:07,785 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@41133029 issued 2 check-sat command(s) [2020-07-19 23:02:07,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:02:07,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:09,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930758247] [2020-07-19 23:02:09,145 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:09,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112877042] [2020-07-19 23:02:09,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:02:09,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 23:02:09,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606782783] [2020-07-19 23:02:09,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:02:09,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:09,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:02:09,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:02:09,147 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-07-19 23:02:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:11,582 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-19 23:02:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:02:11,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-07-19 23:02:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:11,584 INFO L225 Difference]: With dead ends: 48 [2020-07-19 23:02:11,584 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 23:02:11,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:02:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 23:02:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 23:02:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:02:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-19 23:02:11,600 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 25 [2020-07-19 23:02:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:11,601 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-19 23:02:11,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:02:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-19 23:02:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:02:11,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:11,604 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] [2020-07-19 23:02:11,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:11,819 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash -516331098, now seen corresponding path program 3 times [2020-07-19 23:02:11,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:11,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615821277] [2020-07-19 23:02:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:11,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615821277] [2020-07-19 23:02:11,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907910465] [2020-07-19 23:02:11,973 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60700117 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:12,018 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@60700117 issued 3 check-sat command(s) [2020-07-19 23:02:12,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:12,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:02:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:16,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:16,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-19 23:02:16,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117922621] [2020-07-19 23:02:16,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:02:16,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:02:16,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2020-07-19 23:02:16,285 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 15 states. [2020-07-19 23:02:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:22,748 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-07-19 23:02:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:02:22,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-07-19 23:02:22,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:22,755 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:02:22,755 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 23:02:22,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2020-07-19 23:02:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 23:02:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-19 23:02:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:02:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-19 23:02:22,762 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 27 [2020-07-19 23:02:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:22,763 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-19 23:02:22,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:02:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-19 23:02:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 23:02:22,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:22,764 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] [2020-07-19 23:02:22,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:22,976 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1878386625, now seen corresponding path program 4 times [2020-07-19 23:02:22,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:22,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121114950] [2020-07-19 23:02:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:22,994 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:22,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692558808] [2020-07-19 23:02:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33bf94a4 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:23,055 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@33bf94a4 issued 4 check-sat command(s) [2020-07-19 23:02:23,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:02:23,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:23,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121114950] [2020-07-19 23:02:23,321 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:23,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692558808] [2020-07-19 23:02:23,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:02:23,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-19 23:02:23,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007020826] [2020-07-19 23:02:23,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:02:23,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:23,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:02:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:02:23,323 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 15 states. [2020-07-19 23:02:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:23,769 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-07-19 23:02:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:02:23,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-07-19 23:02:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:23,772 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:02:23,772 INFO L226 Difference]: Without dead ends: 49 [2020-07-19 23:02:23,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:02:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-19 23:02:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-19 23:02:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:02:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-07-19 23:02:23,782 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 29 [2020-07-19 23:02:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:23,783 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-07-19 23:02:23,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:02:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-07-19 23:02:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:02:23,784 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:23,784 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] [2020-07-19 23:02:23,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:02:23,985 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash 841482334, now seen corresponding path program 5 times [2020-07-19 23:02:23,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:23,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061388964] [2020-07-19 23:02:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:24,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061388964] [2020-07-19 23:02:24,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017124269] [2020-07-19 23:02:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@522431d7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:24,303 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@522431d7 issued 2 check-sat command(s) [2020-07-19 23:02:24,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 23:02:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:02:32,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:32,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-07-19 23:02:32,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31249637] [2020-07-19 23:02:32,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:02:32,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:32,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:02:32,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=320, Unknown=3, NotChecked=0, Total=380 [2020-07-19 23:02:32,722 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 20 states. [2020-07-19 23:02:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:33,135 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-07-19 23:02:33,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:02:33,137 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-07-19 23:02:33,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:33,138 INFO L225 Difference]: With dead ends: 65 [2020-07-19 23:02:33,138 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 23:02:33,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=85, Invalid=464, Unknown=3, NotChecked=0, Total=552 [2020-07-19 23:02:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 23:02:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-19 23:02:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 23:02:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-07-19 23:02:33,146 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 31 [2020-07-19 23:02:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:33,147 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-07-19 23:02:33,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:02:33,147 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-07-19 23:02:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:02:33,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:33,148 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] [2020-07-19 23:02:33,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:33,363 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:33,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1492674782, now seen corresponding path program 6 times [2020-07-19 23:02:33,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:33,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472919040] [2020-07-19 23:02:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-19 23:02:33,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472919040] [2020-07-19 23:02:33,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:02:33,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:02:33,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752586496] [2020-07-19 23:02:33,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:02:33,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:02:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:02:33,427 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 3 states. [2020-07-19 23:02:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:33,448 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-07-19 23:02:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:02:33,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-19 23:02:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:33,450 INFO L225 Difference]: With dead ends: 60 [2020-07-19 23:02:33,450 INFO L226 Difference]: Without dead ends: 47 [2020-07-19 23:02:33,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:02:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-19 23:02:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-19 23:02:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-19 23:02:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-07-19 23:02:33,458 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 31 [2020-07-19 23:02:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:33,459 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-07-19 23:02:33,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:02:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-07-19 23:02:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:02:33,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:33,460 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:33,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-19 23:02:33,461 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:33,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1099647772, now seen corresponding path program 7 times [2020-07-19 23:02:33,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:33,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375501160] [2020-07-19 23:02:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:33,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375501160] [2020-07-19 23:02:33,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126312205] [2020-07-19 23:02:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e108077 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:33,691 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e108077 issued 2 check-sat command(s) [2020-07-19 23:02:33,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:33,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:02:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:34,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:34,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-19 23:02:34,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840640580] [2020-07-19 23:02:34,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:02:34,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:34,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:02:34,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=264, Unknown=1, NotChecked=0, Total=306 [2020-07-19 23:02:34,807 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 18 states. [2020-07-19 23:02:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:35,169 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-07-19 23:02:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:02:35,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-07-19 23:02:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:35,171 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:02:35,171 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:02:35,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=351, Unknown=1, NotChecked=0, Total=420 [2020-07-19 23:02:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:02:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 23:02:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:02:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-07-19 23:02:35,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2020-07-19 23:02:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:35,180 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-07-19 23:02:35,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:02:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-07-19 23:02:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-19 23:02:35,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:35,182 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:02:35,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:35,393 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash -202245895, now seen corresponding path program 8 times [2020-07-19 23:02:35,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:35,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781911233] [2020-07-19 23:02:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:02:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:35,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781911233] [2020-07-19 23:02:35,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036471723] [2020-07-19 23:02:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d1d67d3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:35,692 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4d1d67d3 issued 2 check-sat command(s) [2020-07-19 23:02:35,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:35,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 23:02:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:36,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:02:36,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2020-07-19 23:02:36,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520978541] [2020-07-19 23:02:36,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:02:36,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:36,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:02:36,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:02:36,368 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 22 states. [2020-07-19 23:02:38,560 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-19 23:02:42,083 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-19 23:02:44,212 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-19 23:02:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:44,480 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-07-19 23:02:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:02:44,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2020-07-19 23:02:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:44,485 INFO L225 Difference]: With dead ends: 78 [2020-07-19 23:02:44,485 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 23:02:44,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=138, Invalid=916, Unknown=2, NotChecked=0, Total=1056 [2020-07-19 23:02:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 23:02:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-19 23:02:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:02:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2020-07-19 23:02:44,497 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 33 [2020-07-19 23:02:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:44,498 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2020-07-19 23:02:44,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:02:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2020-07-19 23:02:44,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 23:02:44,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:02:44,502 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] [2020-07-19 23:02:44,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:02:44,704 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:02:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:02:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -825201876, now seen corresponding path program 1 times [2020-07-19 23:02:44,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:02:44,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385003454] [2020-07-19 23:02:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f42f88b [2020-07-19 23:02:44,712 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 23:02:44,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339058474] [2020-07-19 23:02:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@126d6613 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:02:44,806 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@126d6613 issued 4 check-sat command(s) [2020-07-19 23:02:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:02:44,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-19 23:02:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:02:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:02:45,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385003454] [2020-07-19 23:02:45,094 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 23:02:45,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339058474] [2020-07-19 23:02:45,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:02:45,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-19 23:02:45,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056557615] [2020-07-19 23:02:45,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:02:45,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:02:45,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:02:45,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:02:45,096 INFO L87 Difference]: Start difference. First operand 35 states and 34 transitions. Second operand 15 states. [2020-07-19 23:02:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:02:45,538 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2020-07-19 23:02:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:02:45,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-07-19 23:02:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:02:45,541 INFO L225 Difference]: With dead ends: 35 [2020-07-19 23:02:45,541 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:02:45,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:02:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:02:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:02:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:02:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:02:45,543 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-19 23:02:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:02:45,543 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:02:45,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:02:45,544 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:02:45,544 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:02:45,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:02:45,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:05:50,269 WARN L193 SmtUtils]: Spent 3.07 m on a formula simplification. DAG size of input: 137 DAG size of output: 72 [2020-07-19 23:05:50,277 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 23:05:50,277 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:05:50,277 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:05:50,277 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:05:50,277 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:05:50,277 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:05:50,278 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 30 46) the Hoare annotation is: true [2020-07-19 23:05:50,278 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 30 46) no Hoare annotation was computed. [2020-07-19 23:05:50,278 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-19 23:05:50,278 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (<= main_~y~0 18) (<= 18 main_~y~0) (= main_~x~0 (* main_~g~0 7)) (= 63 main_~x~0)) [2020-07-19 23:05:50,278 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= 18 main_~y~0) (= main_~x~0 (* main_~g~0 7)) (= 63 main_~x~0)) [2020-07-19 23:05:50,279 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 30 46) no Hoare annotation was computed. [2020-07-19 23:05:50,279 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (= 18 main_~y~0) (= main_~x~0 (* main_~g~0 7)) (= 63 main_~x~0)) [2020-07-19 23:05:50,279 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (= 18 main_~y~0) (= 63 main_~x~0)) [2020-07-19 23:05:50,280 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-19 23:05:50,280 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-19 23:05:50,280 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-19 23:05:50,280 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-19 23:05:50,280 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-19 23:05:50,281 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-19 23:05:50,281 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-19 23:05:50,281 INFO L268 CegarLoopResult]: For program point gcd_testEXIT(lines 10 27) no Hoare annotation was computed. [2020-07-19 23:05:50,281 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2020-07-19 23:05:50,281 INFO L268 CegarLoopResult]: For program point L13-1(lines 11 27) no Hoare annotation was computed. [2020-07-19 23:05:50,281 INFO L271 CegarLoopResult]: At program point gcd_testENTRY(lines 10 27) the Hoare annotation is: true [2020-07-19 23:05:50,281 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-19 23:05:50,282 INFO L264 CegarLoopResult]: At program point L20-2(lines 19 25) the Hoare annotation is: (let ((.cse0 (<= (div (+ gcd_test_~a (* |gcd_test_#in~a| (- 1))) (- 3)) |gcd_test_#in~b|)) (.cse4 (+ gcd_test_~b gcd_test_~a)) (.cse3 (* 2 gcd_test_~b)) (.cse1 (= gcd_test_~b |gcd_test_#in~b|))) (or (and (<= (+ gcd_test_~b (* 2 gcd_test_~a)) |gcd_test_#in~b|) (<= 0 gcd_test_~b) .cse0) (let ((.cse2 (+ .cse3 gcd_test_~a))) (and .cse1 (<= .cse2 |gcd_test_#in~a|) (<= |gcd_test_#in~a| .cse2))) (and (exists ((gcd_test_~a Int)) (and (<= |gcd_test_#in~b| (+ gcd_test_~b gcd_test_~a)) (<= |gcd_test_#in~b| (div (+ (* gcd_test_~a (- 1)) |gcd_test_#in~a|) 3)))) (<= .cse4 |gcd_test_#in~b|) .cse0) (and .cse1 (<= |gcd_test_#in~b| (div (+ (* gcd_test_~a (- 1)) |gcd_test_#in~a|) 3)) (<= |gcd_test_#in~a| (+ (* 3 gcd_test_~b) gcd_test_~a))) (and (<= |gcd_test_#in~a| 0) (<= |gcd_test_#in~a| gcd_test_~a)) (and .cse1 (<= |gcd_test_#in~a| .cse4) (<= .cse4 |gcd_test_#in~a|)) (and (<= (+ (* 21 |gcd_test_#in~b|) 1) (+ .cse3 (* 6 |gcd_test_#in~a|))) (exists ((v_gcd_test_~a_23 Int)) (and (<= (+ |gcd_test_#in~b| 1) (* 2 v_gcd_test_~a_23)) (<= |gcd_test_#in~b| (div (+ (* v_gcd_test_~a_23 (- 1)) |gcd_test_#in~a|) 3))))) (<= (+ (* 2 |gcd_test_#in~a|) 1) (* 7 |gcd_test_#in~b|)) (<= |gcd_test_#in~a| |gcd_test_#in~b|) (and .cse1 (= gcd_test_~a |gcd_test_#in~a|)))) [2020-07-19 23:05:50,282 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-07-19 23:05:50,282 INFO L268 CegarLoopResult]: For program point L12-2(lines 11 27) no Hoare annotation was computed. [2020-07-19 23:05:50,282 INFO L268 CegarLoopResult]: For program point gcd_testFINAL(lines 10 27) no Hoare annotation was computed. [2020-07-19 23:05:50,294 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,295 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,296 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-19 23:05:50,296 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-19 23:05:50,304 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,305 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,308 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-19 23:05:50,308 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-19 23:05:50,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:05:50 BoogieIcfgContainer [2020-07-19 23:05:50,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:05:50,314 INFO L168 Benchmark]: Toolchain (without parser) took 225912.54 ms. Allocated memory was 146.8 MB in the beginning and 270.5 MB in the end (delta: 123.7 MB). Free memory was 104.3 MB in the beginning and 178.6 MB in the end (delta: -74.2 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:05:50,315 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 23:05:50,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.59 ms. Allocated memory is still 146.8 MB. Free memory was 103.9 MB in the beginning and 94.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:05:50,317 INFO L168 Benchmark]: Boogie Preprocessor took 110.18 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.3 MB in the beginning and 183.6 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:05:50,320 INFO L168 Benchmark]: RCFGBuilder took 271.33 ms. Allocated memory is still 203.9 MB. Free memory was 183.6 MB in the beginning and 169.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:05:50,321 INFO L168 Benchmark]: TraceAbstraction took 225289.19 ms. Allocated memory was 203.9 MB in the beginning and 270.5 MB in the end (delta: 66.6 MB). Free memory was 169.3 MB in the beginning and 178.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:05:50,324 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.8 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.59 ms. Allocated memory is still 146.8 MB. Free memory was 103.9 MB in the beginning and 94.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.18 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 94.3 MB in the beginning and 183.6 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 271.33 ms. Allocated memory is still 203.9 MB. Free memory was 183.6 MB in the beginning and 169.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 225289.19 ms. Allocated memory was 203.9 MB in the beginning and 270.5 MB in the end (delta: 66.6 MB). Free memory was 169.3 MB in the beginning and 178.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 57.3 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[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 19]: Loop Invariant [2020-07-19 23:05:50,339 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,339 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,340 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-19 23:05:50,340 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-19 23:05:50,341 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,344 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[gcd_test_~a,QUANTIFIED] [2020-07-19 23:05:50,345 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] [2020-07-19 23:05:50,345 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_gcd_test_~a_23,QUANTIFIED] Derived loop invariant: ((((((((((b + 2 * a <= \old(b) && 0 <= b) && (a + \old(a) * -1) / -3 <= \old(b)) || ((b == \old(b) && 2 * b + a <= \old(a)) && \old(a) <= 2 * b + a)) || (((\exists gcd_test_~a : int :: \old(b) <= b + gcd_test_~a && \old(b) <= (gcd_test_~a * -1 + \old(a)) / 3) && b + a <= \old(b)) && (a + \old(a) * -1) / -3 <= \old(b))) || ((b == \old(b) && \old(b) <= (a * -1 + \old(a)) / 3) && \old(a) <= 3 * b + a)) || (\old(a) <= 0 && \old(a) <= a)) || ((b == \old(b) && \old(a) <= b + a) && b + a <= \old(a))) || (21 * \old(b) + 1 <= 2 * b + 6 * \old(a) && (\exists v_gcd_test_~a_23 : int :: \old(b) + 1 <= 2 * v_gcd_test_~a_23 && \old(b) <= (v_gcd_test_~a_23 * -1 + \old(a)) / 3))) || 2 * \old(a) + 1 <= 7 * \old(b)) || \old(a) <= \old(b)) || (b == \old(b) && a == \old(a)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 40.6s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 19.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 184.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 184 SDslu, 1653 SDs, 0 SdLazy, 1716 SolverSat, 74 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 11.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 23.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 49 PreInvPairs, 79 NumberOfFragments, 214 HoareAnnotationTreeSize, 49 FomulaSimplifications, 511 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 384 FormulaSimplificationTreeSizeReductionInter, 184.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 479 NumberOfCodeBlocks, 371 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 461 ConstructedInterpolants, 21 QuantifiedInterpolants, 72393 SizeOfPredicates, 36 NumberOfNonLiveVariables, 551 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 45/376 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...