/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:47:01,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:47:01,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:47:01,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:47:01,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:47:01,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:47:01,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:47:01,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:47:01,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:47:01,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:47:01,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:47:01,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:47:01,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:47:01,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:47:01,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:47:01,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:47:01,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:47:01,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:47:01,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:47:01,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:47:01,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:47:01,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:47:01,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:47:01,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:47:01,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:47:01,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:47:01,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:47:01,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:47:01,398 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 [2020-11-06 22:47:01,466 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:47:01,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:47:01,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:47:01,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:47:01,468 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:47:01,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:47:01,469 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:47:01,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:47:01,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:47:01,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:47:01,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:47:01,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:47:01,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:47:01,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:47:01,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:47:01,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:47:01,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:47:01,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:47:01,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:47:01,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:47:01,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:47:01,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:47:01,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:47:01,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:47:01,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:47:01,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:47:01,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:47:01,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:47:01,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:47:01,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:47:01,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:47:01,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:47:01,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:47:01,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:47:01,933 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:47:01,934 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-11-06 22:47:02,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9249710b7/394896c775934863b5f41be122c9949c/FLAGf8bcbe44e [2020-11-06 22:47:02,674 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:47:02,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-11-06 22:47:02,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9249710b7/394896c775934863b5f41be122c9949c/FLAGf8bcbe44e [2020-11-06 22:47:03,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9249710b7/394896c775934863b5f41be122c9949c [2020-11-06 22:47:03,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:47:03,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:47:03,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:03,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:47:03,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:47:03,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6007c4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03, skipping insertion in model container [2020-11-06 22:47:03,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:47:03,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:47:03,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:03,363 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:47:03,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:03,404 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:47:03,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03 WrapperNode [2020-11-06 22:47:03,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:03,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:47:03,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:47:03,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:47:03,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (1/1) ... [2020-11-06 22:47:03,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:47:03,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:47:03,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:47:03,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:47:03,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (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 [2020-11-06 22:47:03,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:47:03,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:47:03,536 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:47:03,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:47:03,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:47:03,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:47:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:47:03,536 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:47:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:47:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:47:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:47:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:47:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:47:03,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:47:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:47:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:47:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:47:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:47:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:47:03,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:47:03,967 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:47:03,967 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:47:03,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:03 BoogieIcfgContainer [2020-11-06 22:47:03,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:47:03,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:47:03,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:47:03,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:47:03,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:03" (1/3) ... [2020-11-06 22:47:03,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641412a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:03, skipping insertion in model container [2020-11-06 22:47:03,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:03" (2/3) ... [2020-11-06 22:47:03,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641412a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:03, skipping insertion in model container [2020-11-06 22:47:03,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:03" (3/3) ... [2020-11-06 22:47:03,981 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-11-06 22:47:03,998 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:47:04,001 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:47:04,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:47:04,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:47:04,042 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:47:04,042 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:47:04,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:47:04,042 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:47:04,043 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:47:04,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:47:04,043 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:47:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-06 22:47:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:47:04,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:04,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:04,069 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:04,076 INFO L82 PathProgramCache]: Analyzing trace with hash -36378530, now seen corresponding path program 1 times [2020-11-06 22:47:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:04,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892321037] [2020-11-06 22:47:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:04,792 WARN L194 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-11-06 22:47:04,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:04,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892321037] [2020-11-06 22:47:04,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:47:04,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:47:04,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486858733] [2020-11-06 22:47:04,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:47:04,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:04,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:47:04,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:47:04,948 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 8 states. [2020-11-06 22:47:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:07,789 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2020-11-06 22:47:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:47:07,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-06 22:47:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:07,802 INFO L225 Difference]: With dead ends: 73 [2020-11-06 22:47:07,802 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:47:07,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:47:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:47:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-11-06 22:47:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-06 22:47:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-11-06 22:47:07,851 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 15 [2020-11-06 22:47:07,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:07,852 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-11-06 22:47:07,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:47:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-11-06 22:47:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:47:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:07,853 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:07,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:47:07,854 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:07,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2128527166, now seen corresponding path program 1 times [2020-11-06 22:47:07,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:07,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50140827] [2020-11-06 22:47:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:08,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:08,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:08,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50140827] [2020-11-06 22:47:08,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531871563] [2020-11-06 22:47:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:47:08,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:08,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:08,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2020-11-06 22:47:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242119602] [2020-11-06 22:47:08,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:47:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:08,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:47:08,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:47:08,494 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 12 states. [2020-11-06 22:47:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:09,201 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2020-11-06 22:47:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:47:09,202 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-11-06 22:47:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:09,203 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:47:09,203 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 22:47:09,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:47:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 22:47:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-11-06 22:47:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-06 22:47:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-11-06 22:47:09,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2020-11-06 22:47:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:09,218 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-11-06 22:47:09,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:47:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-11-06 22:47:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:47:09,219 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:09,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:09,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:47:09,433 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 803105763, now seen corresponding path program 1 times [2020-11-06 22:47:09,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:09,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013002982] [2020-11-06 22:47:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,845 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-11-06 22:47:09,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:09,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013002982] [2020-11-06 22:47:09,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627036946] [2020-11-06 22:47:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:10,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-06 22:47:10,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:10,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:10,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:10,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-11-06 22:47:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854786102] [2020-11-06 22:47:10,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:47:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:47:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:47:10,343 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 15 states. [2020-11-06 22:47:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:11,459 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2020-11-06 22:47:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:47:11,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-11-06 22:47:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:11,461 INFO L225 Difference]: With dead ends: 75 [2020-11-06 22:47:11,461 INFO L226 Difference]: Without dead ends: 57 [2020-11-06 22:47:11,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:47:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-06 22:47:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-11-06 22:47:11,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-06 22:47:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-11-06 22:47:11,475 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 30 [2020-11-06 22:47:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:11,476 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-11-06 22:47:11,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:47:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-11-06 22:47:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:47:11,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:11,478 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:11,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:11,692 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash -163948740, now seen corresponding path program 1 times [2020-11-06 22:47:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:11,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578194438] [2020-11-06 22:47:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:12,252 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-11-06 22:47:12,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:12,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:12,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:47:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578194438] [2020-11-06 22:47:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266245325] [2020-11-06 22:47:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:12,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-06 22:47:12,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:12,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:47:12,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:12,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-11-06 22:47:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237720281] [2020-11-06 22:47:12,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:47:12,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:12,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:47:12,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:47:12,797 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 19 states. [2020-11-06 22:47:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:14,060 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2020-11-06 22:47:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:47:14,061 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-11-06 22:47:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:14,062 INFO L225 Difference]: With dead ends: 89 [2020-11-06 22:47:14,062 INFO L226 Difference]: Without dead ends: 71 [2020-11-06 22:47:14,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:47:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-06 22:47:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-06 22:47:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-06 22:47:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-11-06 22:47:14,092 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 45 [2020-11-06 22:47:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:14,093 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-11-06 22:47:14,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:47:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-11-06 22:47:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-06 22:47:14,099 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:14,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:14,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:14,313 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:14,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1829600785, now seen corresponding path program 1 times [2020-11-06 22:47:14,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:14,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848164191] [2020-11-06 22:47:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:14,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:14,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:14,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:47:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:47:15,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848164191] [2020-11-06 22:47:15,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607092190] [2020-11-06 22:47:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-06 22:47:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:15,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:47:15,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:15,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-11-06 22:47:15,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161364720] [2020-11-06 22:47:15,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 22:47:15,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:15,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 22:47:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:47:15,560 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 23 states. [2020-11-06 22:47:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:17,160 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2020-11-06 22:47:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:47:17,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-11-06 22:47:17,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:17,165 INFO L225 Difference]: With dead ends: 102 [2020-11-06 22:47:17,165 INFO L226 Difference]: Without dead ends: 84 [2020-11-06 22:47:17,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:47:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-06 22:47:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-11-06 22:47:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-06 22:47:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-11-06 22:47:17,199 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 59 [2020-11-06 22:47:17,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:17,201 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-11-06 22:47:17,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 22:47:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-11-06 22:47:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-06 22:47:17,205 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:17,205 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:17,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:17,421 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash 218915979, now seen corresponding path program 1 times [2020-11-06 22:47:17,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:17,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314227127] [2020-11-06 22:47:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:47:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:47:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:47:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314227127] [2020-11-06 22:47:18,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520184797] [2020-11-06 22:47:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-06 22:47:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:18,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:47:18,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:18,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-11-06 22:47:18,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575893530] [2020-11-06 22:47:18,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-06 22:47:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-06 22:47:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:47:18,914 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 27 states. [2020-11-06 22:47:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:20,431 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2020-11-06 22:47:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:47:20,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-11-06 22:47:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:20,434 INFO L225 Difference]: With dead ends: 114 [2020-11-06 22:47:20,434 INFO L226 Difference]: Without dead ends: 96 [2020-11-06 22:47:20,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2020-11-06 22:47:20,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-06 22:47:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-11-06 22:47:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-06 22:47:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-11-06 22:47:20,461 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 72 [2020-11-06 22:47:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:20,465 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-11-06 22:47:20,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-06 22:47:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-11-06 22:47:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-06 22:47:20,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:20,470 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:20,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:47:20,674 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:20,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1637563911, now seen corresponding path program 1 times [2020-11-06 22:47:20,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:20,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596566373] [2020-11-06 22:47:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:47:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:47:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-11-06 22:47:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:47:21,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596566373] [2020-11-06 22:47:21,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559505544] [2020-11-06 22:47:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-06 22:47:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:22,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:47:22,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:22,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-11-06 22:47:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703392977] [2020-11-06 22:47:22,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:47:22,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:47:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:47:22,199 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 31 states. [2020-11-06 22:47:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:24,482 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2020-11-06 22:47:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:47:24,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2020-11-06 22:47:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:24,485 INFO L225 Difference]: With dead ends: 125 [2020-11-06 22:47:24,485 INFO L226 Difference]: Without dead ends: 107 [2020-11-06 22:47:24,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2020-11-06 22:47:24,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-06 22:47:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-11-06 22:47:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-06 22:47:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-11-06 22:47:24,520 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 84 [2020-11-06 22:47:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:24,521 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-11-06 22:47:24,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:47:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-11-06 22:47:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-06 22:47:24,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:24,523 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:24,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:24,741 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:24,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2040663268, now seen corresponding path program 1 times [2020-11-06 22:47:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:24,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679809229] [2020-11-06 22:47:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:47:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:47:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-11-06 22:47:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-06 22:47:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 149 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-06 22:47:25,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679809229] [2020-11-06 22:47:25,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053697796] [2020-11-06 22:47:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 51 conjunts are in the unsatisfiable core [2020-11-06 22:47:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:26,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 12 proven. 149 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-06 22:47:26,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:26,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-11-06 22:47:26,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641721380] [2020-11-06 22:47:26,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-06 22:47:26,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:26,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-06 22:47:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:47:26,464 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 35 states. [2020-11-06 22:47:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:29,228 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2020-11-06 22:47:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:47:29,229 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 95 [2020-11-06 22:47:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:29,230 INFO L225 Difference]: With dead ends: 135 [2020-11-06 22:47:29,230 INFO L226 Difference]: Without dead ends: 117 [2020-11-06 22:47:29,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=307, Invalid=2449, Unknown=0, NotChecked=0, Total=2756 [2020-11-06 22:47:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-06 22:47:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-11-06 22:47:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-06 22:47:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-11-06 22:47:29,247 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 95 [2020-11-06 22:47:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:29,248 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-11-06 22:47:29,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-06 22:47:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-11-06 22:47:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-06 22:47:29,250 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:29,250 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:29,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:29,464 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:29,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1184588731, now seen corresponding path program 1 times [2020-11-06 22:47:29,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:29,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721523299] [2020-11-06 22:47:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:47:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:47:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-11-06 22:47:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-06 22:47:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-11-06 22:47:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-06 22:47:30,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721523299] [2020-11-06 22:47:30,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823529798] [2020-11-06 22:47:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2020-11-06 22:47:30,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:31,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 14 proven. 189 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-06 22:47:31,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:31,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-11-06 22:47:31,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799430298] [2020-11-06 22:47:31,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-06 22:47:31,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-06 22:47:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-11-06 22:47:31,540 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 39 states. [2020-11-06 22:47:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:34,634 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2020-11-06 22:47:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:47:34,635 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 105 [2020-11-06 22:47:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:34,637 INFO L225 Difference]: With dead ends: 144 [2020-11-06 22:47:34,638 INFO L226 Difference]: Without dead ends: 126 [2020-11-06 22:47:34,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=370, Invalid=3052, Unknown=0, NotChecked=0, Total=3422 [2020-11-06 22:47:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-06 22:47:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-11-06 22:47:34,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-06 22:47:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2020-11-06 22:47:34,655 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 105 [2020-11-06 22:47:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:34,656 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2020-11-06 22:47:34,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-06 22:47:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2020-11-06 22:47:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-11-06 22:47:34,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:34,658 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:34,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:47:34,874 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:34,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:34,875 INFO L82 PathProgramCache]: Analyzing trace with hash -482469717, now seen corresponding path program 1 times [2020-11-06 22:47:34,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:34,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255810079] [2020-11-06 22:47:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:47:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:47:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-11-06 22:47:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-06 22:47:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-11-06 22:47:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-11-06 22:47:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-06 22:47:35,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255810079] [2020-11-06 22:47:35,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517021] [2020-11-06 22:47:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-06 22:47:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 59 conjunts are in the unsatisfiable core [2020-11-06 22:47:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:36,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-06 22:47:37,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:37,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2020-11-06 22:47:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177435890] [2020-11-06 22:47:37,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-06 22:47:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-06 22:47:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1559, Unknown=0, NotChecked=0, Total=1806 [2020-11-06 22:47:37,151 INFO L87 Difference]: Start difference. First operand 126 states and 134 transitions. Second operand 43 states. [2020-11-06 22:47:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:40,917 INFO L93 Difference]: Finished difference Result 163 states and 190 transitions. [2020-11-06 22:47:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-06 22:47:40,917 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 114 [2020-11-06 22:47:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:40,919 INFO L225 Difference]: With dead ends: 163 [2020-11-06 22:47:40,919 INFO L226 Difference]: Without dead ends: 145 [2020-11-06 22:47:40,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=466, Invalid=3956, Unknown=0, NotChecked=0, Total=4422 [2020-11-06 22:47:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-06 22:47:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 136. [2020-11-06 22:47:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-06 22:47:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-11-06 22:47:40,943 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 114 [2020-11-06 22:47:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:40,944 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-11-06 22:47:40,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-06 22:47:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-11-06 22:47:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-06 22:47:40,946 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:40,947 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 8, 7, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:41,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:41,162 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2037508979, now seen corresponding path program 2 times [2020-11-06 22:47:41,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:41,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747320962] [2020-11-06 22:47:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-11-06 22:47:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-06 22:47:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-11-06 22:47:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-11-06 22:47:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-11-06 22:47:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-11-06 22:47:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-11-06 22:47:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-11-06 22:47:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-11-06 22:47:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 40 proven. 284 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-11-06 22:47:42,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747320962] [2020-11-06 22:47:42,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571641380] [2020-11-06 22:47:42,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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