/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/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:50,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:50,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:50,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:46:50,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:46:50,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:46:50,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:46:50,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:46:50,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:46:50,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:46:50,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:46:50,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:46:50,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:46:50,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:46:50,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:46:50,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:46:50,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:46:50,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:46:50,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:46:50,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:46:50,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:46:50,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:46:50,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:46:50,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:46:50,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:46:50,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:50,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:50,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:50,416 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 22:46:50,443 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:50,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:50,445 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:50,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:50,446 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:50,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:50,446 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:50,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:50,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:50,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:50,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:50,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:50,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:50,448 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:50,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:50,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:50,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:50,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:50,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:50,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:50,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:50,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:50,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:50,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:50,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:50,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:50,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:50,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:50,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:50,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:50,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:50,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:50,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:50,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:50,954 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:50,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-11-06 22:46:51,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295e21aed/76301d5e83884ca59182f2a24cbb2a43/FLAG9485c92cd [2020-11-06 22:46:51,753 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:51,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-11-06 22:46:51,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295e21aed/76301d5e83884ca59182f2a24cbb2a43/FLAG9485c92cd [2020-11-06 22:46:52,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/295e21aed/76301d5e83884ca59182f2a24cbb2a43 [2020-11-06 22:46:52,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:52,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:52,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:52,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:52,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:52,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5bc0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52, skipping insertion in model container [2020-11-06 22:46:52,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:52,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:52,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:52,377 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:52,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:52,418 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:52,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52 WrapperNode [2020-11-06 22:46:52,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:52,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:52,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:52,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:52,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (1/1) ... [2020-11-06 22:46:52,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:52,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:52,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:52,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:52,461 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (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 22:46:52,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:52,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:52,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:52,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:52,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:52,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:52,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:52,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:52,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:52,869 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:52,870 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:46:52,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:52 BoogieIcfgContainer [2020-11-06 22:46:52,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:52,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:52,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:52,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:52,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:52" (1/3) ... [2020-11-06 22:46:52,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233d0380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:52, skipping insertion in model container [2020-11-06 22:46:52,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:52" (2/3) ... [2020-11-06 22:46:52,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233d0380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:52, skipping insertion in model container [2020-11-06 22:46:52,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:52" (3/3) ... [2020-11-06 22:46:52,882 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-11-06 22:46:52,917 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:52,928 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:52,943 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:52,995 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:52,995 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:52,996 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:52,996 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:52,996 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:52,996 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:52,996 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:52,996 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:46:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:46:53,024 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:53,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:53,026 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-11-06 22:46:53,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:53,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118259745] [2020-11-06 22:46:53,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:53,405 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-06 22:46:53,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:53,458 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 22:46:53,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118259745] [2020-11-06 22:46:53,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:53,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:46:53,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83979762] [2020-11-06 22:46:53,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:46:53,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:46:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:53,501 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-11-06 22:46:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:53,615 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-11-06 22:46:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:46:53,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:46:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:53,632 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:46:53,632 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:46:53,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:46:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:46:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:46:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-06 22:46:53,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-11-06 22:46:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:53,701 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-06 22:46:53,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:46:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-06 22:46:53,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:46:53,702 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:53,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:53,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:53,703 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:53,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:53,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1192214991, now seen corresponding path program 1 times [2020-11-06 22:46:53,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:53,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514856320] [2020-11-06 22:46:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:53,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:53,893 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 22:46:53,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514856320] [2020-11-06 22:46:53,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:53,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:46:53,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980648114] [2020-11-06 22:46:53,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:53,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:53,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:53,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:46:53,897 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-11-06 22:46:54,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:54,068 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-06 22:46:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:46:54,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-06 22:46:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:54,070 INFO L225 Difference]: With dead ends: 24 [2020-11-06 22:46:54,070 INFO L226 Difference]: Without dead ends: 18 [2020-11-06 22:46:54,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:46:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-06 22:46:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-06 22:46:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:46:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-06 22:46:54,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-11-06 22:46:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:54,080 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-06 22:46:54,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:46:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-06 22:46:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:46:54,081 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:54,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:54,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:46:54,082 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1953512822, now seen corresponding path program 1 times [2020-11-06 22:46:54,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:54,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293788693] [2020-11-06 22:46:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:54,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:54,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293788693] [2020-11-06 22:46:54,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:54,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:46:54,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165106555] [2020-11-06 22:46:54,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:46:54,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:54,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:46:54,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:46:54,241 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-11-06 22:46:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:54,313 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-06 22:46:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:46:54,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-06 22:46:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:54,314 INFO L225 Difference]: With dead ends: 30 [2020-11-06 22:46:54,315 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:46:54,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:46:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:46:54,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-06 22:46:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:46:54,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-06 22:46:54,326 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-11-06 22:46:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:54,326 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-06 22:46:54,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:46:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-06 22:46:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:46:54,327 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:54,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:54,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:46:54,328 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash 556673393, now seen corresponding path program 1 times [2020-11-06 22:46:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:54,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640716944] [2020-11-06 22:46:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:54,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:54,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640716944] [2020-11-06 22:46:54,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983023384] [2020-11-06 22:46:54,481 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 22:46:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:54,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:46:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:54,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:54,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:46:54,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356447039] [2020-11-06 22:46:54,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:54,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:54,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:46:54,583 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-11-06 22:46:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:54,708 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-11-06 22:46:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:46:54,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-06 22:46:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:54,709 INFO L225 Difference]: With dead ends: 33 [2020-11-06 22:46:54,709 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:46:54,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:46:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:46:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-06 22:46:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:46:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-06 22:46:54,717 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-11-06 22:46:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:54,717 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-06 22:46:54,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:46:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-06 22:46:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:46:54,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:54,719 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:54,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:54,932 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1838613802, now seen corresponding path program 2 times [2020-11-06 22:46:54,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:54,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168494019] [2020-11-06 22:46:54,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:55,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:55,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168494019] [2020-11-06 22:46:55,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005088603] [2020-11-06 22:46:55,071 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 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 22:46:55,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:46:55,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:46:55,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:55,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:55,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-06 22:46:55,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020637869] [2020-11-06 22:46:55,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:46:55,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:55,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:46:55,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:46:55,187 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-11-06 22:46:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:55,346 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-06 22:46:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:46:55,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-06 22:46:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:55,348 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:46:55,348 INFO L226 Difference]: Without dead ends: 27 [2020-11-06 22:46:55,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:46:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-06 22:46:55,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-11-06 22:46:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:46:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-06 22:46:55,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-11-06 22:46:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:55,356 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-06 22:46:55,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:46:55,357 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-06 22:46:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-06 22:46:55,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:55,358 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:55,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:55,571 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1276142289, now seen corresponding path program 3 times [2020-11-06 22:46:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:55,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729543276] [2020-11-06 22:46:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:55,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:55,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729543276] [2020-11-06 22:46:55,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969376270] [2020-11-06 22:46:55,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 22:46:55,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-06 22:46:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:46:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:46:55,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:55,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-06 22:46:55,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418539467] [2020-11-06 22:46:55,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:46:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:46:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:46:55,926 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2020-11-06 22:46:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:56,412 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-11-06 22:46:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:46:56,413 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-11-06 22:46:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:56,414 INFO L225 Difference]: With dead ends: 45 [2020-11-06 22:46:56,414 INFO L226 Difference]: Without dead ends: 33 [2020-11-06 22:46:56,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:46:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-06 22:46:56,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-06 22:46:56,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:46:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-11-06 22:46:56,423 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-11-06 22:46:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:56,424 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-11-06 22:46:56,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:46:56,424 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-11-06 22:46:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:46:56,425 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:56,425 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:56,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:56,640 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:56,641 INFO L82 PathProgramCache]: Analyzing trace with hash 892382895, now seen corresponding path program 4 times [2020-11-06 22:46:56,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:56,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460806390] [2020-11-06 22:46:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:56,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460806390] [2020-11-06 22:46:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406281631] [2020-11-06 22:46:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 22:46:56,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:46:56,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:46:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:56,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-06 22:46:56,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791698419] [2020-11-06 22:46:56,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:46:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:46:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:46:56,932 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-11-06 22:46:57,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:57,232 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-11-06 22:46:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:46:57,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-11-06 22:46:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:57,233 INFO L225 Difference]: With dead ends: 48 [2020-11-06 22:46:57,233 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:46:57,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:46:57,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:46:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-11-06 22:46:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:46:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-11-06 22:46:57,242 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2020-11-06 22:46:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:57,242 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-11-06 22:46:57,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:46:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-11-06 22:46:57,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:46:57,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:57,244 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:57,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:57,455 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:57,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1730626328, now seen corresponding path program 5 times [2020-11-06 22:46:57,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:57,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040476975] [2020-11-06 22:46:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:57,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:57,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040476975] [2020-11-06 22:46:57,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670362921] [2020-11-06 22:46:57,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 22:46:58,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-06 22:46:58,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:46:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:58,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:58,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-06 22:46:58,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862766432] [2020-11-06 22:46:58,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:46:58,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:58,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:46:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:46:58,485 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 10 states. [2020-11-06 22:46:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:58,909 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-11-06 22:46:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:46:58,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-11-06 22:46:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:58,911 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:46:58,911 INFO L226 Difference]: Without dead ends: 39 [2020-11-06 22:46:58,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:46:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-06 22:46:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-11-06 22:46:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:46:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-11-06 22:46:58,920 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-11-06 22:46:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:58,921 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-11-06 22:46:58,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:46:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-11-06 22:46:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:46:58,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:58,922 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:59,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:59,126 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1163405297, now seen corresponding path program 6 times [2020-11-06 22:46:59,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:59,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533622582] [2020-11-06 22:46:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:59,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:46:59,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533622582] [2020-11-06 22:46:59,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689990557] [2020-11-06 22:46:59,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 22:46:59,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-06 22:46:59,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:46:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-06 22:46:59,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:59,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2020-11-06 22:46:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127342239] [2020-11-06 22:46:59,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:46:59,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:59,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:46:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:46:59,569 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 15 states. [2020-11-06 22:47:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:00,459 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-11-06 22:47:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:47:00,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-11-06 22:47:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:00,461 INFO L225 Difference]: With dead ends: 60 [2020-11-06 22:47:00,461 INFO L226 Difference]: Without dead ends: 45 [2020-11-06 22:47:00,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:47:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-06 22:47:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-11-06 22:47:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:47:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-06 22:47:00,474 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 36 [2020-11-06 22:47:00,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:00,474 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-06 22:47:00,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:47:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-06 22:47:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:47:00,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:00,476 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:00,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:00,691 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash -50928079, now seen corresponding path program 7 times [2020-11-06 22:47:00,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:00,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215592540] [2020-11-06 22:47:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:00,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:01,008 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:47:01,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215592540] [2020-11-06 22:47:01,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246839998] [2020-11-06 22:47:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to 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 22:47:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:01,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-06 22:47:01,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:01,150 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 61 proven. 77 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:47:01,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:01,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-06 22:47:01,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658041626] [2020-11-06 22:47:01,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:47:01,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:47:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:47:01,156 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 12 states. [2020-11-06 22:47:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:01,780 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-11-06 22:47:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:47:01,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-11-06 22:47:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:01,782 INFO L225 Difference]: With dead ends: 63 [2020-11-06 22:47:01,782 INFO L226 Difference]: Without dead ends: 48 [2020-11-06 22:47:01,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:47:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-06 22:47:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-11-06 22:47:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:47:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-11-06 22:47:01,792 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2020-11-06 22:47:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:01,792 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-11-06 22:47:01,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:47:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-11-06 22:47:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:47:01,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:01,794 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:02,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 22:47:02,008 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1780901610, now seen corresponding path program 8 times [2020-11-06 22:47:02,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:02,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537841840] [2020-11-06 22:47:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:02,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:47:02,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537841840] [2020-11-06 22:47:02,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898129319] [2020-11-06 22:47:02,268 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 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 22:47:02,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:47:02,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:47:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:47:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:47:02,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:02,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-06 22:47:02,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851194431] [2020-11-06 22:47:02,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:47:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:47:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:47:02,398 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 13 states. [2020-11-06 22:47:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:03,093 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-11-06 22:47:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:47:03,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-11-06 22:47:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:03,095 INFO L225 Difference]: With dead ends: 66 [2020-11-06 22:47:03,095 INFO L226 Difference]: Without dead ends: 51 [2020-11-06 22:47:03,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:47:03,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-06 22:47:03,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-11-06 22:47:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:47:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-06 22:47:03,117 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 45 [2020-11-06 22:47:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:03,117 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-06 22:47:03,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:47:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-06 22:47:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-06 22:47:03,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:03,119 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:03,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-06 22:47:03,333 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:03,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1964703633, now seen corresponding path program 9 times [2020-11-06 22:47:03,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:03,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501444185] [2020-11-06 22:47:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:03,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:47:03,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501444185] [2020-11-06 22:47:03,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838508882] [2020-11-06 22:47:03,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 22:47:03,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-06 22:47:03,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:47:03,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:47:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-06 22:47:03,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:03,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2020-11-06 22:47:03,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470998855] [2020-11-06 22:47:03,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:47:03,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:03,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:47:03,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:47:03,853 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 19 states. [2020-11-06 22:47:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:05,072 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-11-06 22:47:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:47:05,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-11-06 22:47:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:05,074 INFO L225 Difference]: With dead ends: 75 [2020-11-06 22:47:05,074 INFO L226 Difference]: Without dead ends: 57 [2020-11-06 22:47:05,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:47:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-06 22:47:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-11-06 22:47:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-06 22:47:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-11-06 22:47:05,085 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 48 [2020-11-06 22:47:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:05,085 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-11-06 22:47:05,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:47:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-11-06 22:47:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-06 22:47:05,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:05,086 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:05,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:05,310 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:05,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:05,311 INFO L82 PathProgramCache]: Analyzing trace with hash -217393937, now seen corresponding path program 10 times [2020-11-06 22:47:05,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:05,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444167899] [2020-11-06 22:47:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:05,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 117 proven. 155 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:47:05,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444167899] [2020-11-06 22:47:05,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584333699] [2020-11-06 22:47:05,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-11-06 22:47:05,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:47:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:47:05,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-06 22:47:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 117 proven. 155 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:47:05,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:05,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-11-06 22:47:05,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461395090] [2020-11-06 22:47:05,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:47:05,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:47:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:47:05,752 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 15 states. [2020-11-06 22:47:06,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:06,657 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-11-06 22:47:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:47:06,662 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-11-06 22:47:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:06,663 INFO L225 Difference]: With dead ends: 78 [2020-11-06 22:47:06,663 INFO L226 Difference]: Without dead ends: 60 [2020-11-06 22:47:06,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:47:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-06 22:47:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-11-06 22:47:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-06 22:47:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-11-06 22:47:06,673 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 54 [2020-11-06 22:47:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:06,673 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-11-06 22:47:06,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:47:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-11-06 22:47:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 22:47:06,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:06,674 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:06,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:06,876 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -240515032, now seen corresponding path program 11 times [2020-11-06 22:47:06,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:06,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051617848] [2020-11-06 22:47:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 128 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:47:07,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051617848] [2020-11-06 22:47:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441024369] [2020-11-06 22:47:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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