/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/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:45:18,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:45:18,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:45:18,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:45:18,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:45:18,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:45:18,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:45:18,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:45:18,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:45:18,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:45:18,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:45:18,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:45:18,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:45:18,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:45:18,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:45:18,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:45:18,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:45:18,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:45:18,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:45:18,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:45:18,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:45:18,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:45:18,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:45:18,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:45:18,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:45:18,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:45:18,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:45:18,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:45:18,923 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 [2020-10-23 18:45:18,973 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:45:18,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:45:18,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:45:18,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:45:18,978 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:45:18,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:45:18,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:45:18,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:45:18,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:45:18,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:45:18,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:45:18,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:45:18,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:45:18,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:45:18,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:45:18,981 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:45:18,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:45:18,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:45:18,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:45:18,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:45:18,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:45:18,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:18,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:45:18,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:45:18,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:45:18,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:45:18,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:45:18,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:45:18,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:45:18,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:45:19,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:45:19,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:45:19,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:45:19,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:45:19,425 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:45:19,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-10-23 18:45:19,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f387119ff/4631c7e8dcac4c309092b2ddcf1ce0d4/FLAGdfc3d79d0 [2020-10-23 18:45:20,158 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:45:20,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-10-23 18:45:20,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f387119ff/4631c7e8dcac4c309092b2ddcf1ce0d4/FLAGdfc3d79d0 [2020-10-23 18:45:20,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f387119ff/4631c7e8dcac4c309092b2ddcf1ce0d4 [2020-10-23 18:45:20,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:45:20,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:45:20,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:20,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:45:20,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:45:20,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d71650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20, skipping insertion in model container [2020-10-23 18:45:20,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:45:20,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:45:20,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:20,766 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:45:20,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:20,817 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:45:20,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20 WrapperNode [2020-10-23 18:45:20,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:20,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:45:20,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:45:20,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:45:20,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (1/1) ... [2020-10-23 18:45:20,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:45:20,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:45:20,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:45:20,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:45:20,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (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 [2020-10-23 18:45:20,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:45:20,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:45:20,964 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:45:20,965 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:45:20,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:45:20,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:45:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:45:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:45:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:45:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:45:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:45:21,508 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:45:21,510 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:45:21,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:21 BoogieIcfgContainer [2020-10-23 18:45:21,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:45:21,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:45:21,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:45:21,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:45:21,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:45:20" (1/3) ... [2020-10-23 18:45:21,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3195efb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:21, skipping insertion in model container [2020-10-23 18:45:21,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:20" (2/3) ... [2020-10-23 18:45:21,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3195efb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:21, skipping insertion in model container [2020-10-23 18:45:21,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:21" (3/3) ... [2020-10-23 18:45:21,527 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-10-23 18:45:21,564 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:45:21,582 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:45:21,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:45:21,660 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:45:21,660 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:45:21,661 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:45:21,661 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:45:21,661 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:45:21,661 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:45:21,661 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:45:21,662 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:45:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-23 18:45:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:45:21,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:21,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:21,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:21,706 INFO L82 PathProgramCache]: Analyzing trace with hash 317129214, now seen corresponding path program 1 times [2020-10-23 18:45:21,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:21,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042968178] [2020-10-23 18:45:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:22,392 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-23 18:45:22,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:22,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042968178] [2020-10-23 18:45:22,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:22,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:45:22,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174680455] [2020-10-23 18:45:22,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:45:22,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:22,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:45:22,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:45:22,615 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 8 states. [2020-10-23 18:45:22,888 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-23 18:45:23,127 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-10-23 18:45:23,316 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-23 18:45:25,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:25,908 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2020-10-23 18:45:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:45:25,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-23 18:45:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:25,920 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:45:25,920 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:45:25,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:45:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:45:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:45:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:45:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-23 18:45:25,968 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-10-23 18:45:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:25,969 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-23 18:45:25,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:45:25,969 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-23 18:45:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:45:25,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:25,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:25,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:45:25,971 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash -811039358, now seen corresponding path program 1 times [2020-10-23 18:45:25,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:25,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032055710] [2020-10-23 18:45:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:26,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:26,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:26,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032055710] [2020-10-23 18:45:26,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323421132] [2020-10-23 18:45:26,148 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 [2020-10-23 18:45:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:26,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:45:26,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:26,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:26,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-23 18:45:26,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973833694] [2020-10-23 18:45:26,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:45:26,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:45:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:45:26,304 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-10-23 18:45:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:30,897 INFO L93 Difference]: Finished difference Result 68 states and 97 transitions. [2020-10-23 18:45:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:45:30,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-23 18:45:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:30,901 INFO L225 Difference]: With dead ends: 68 [2020-10-23 18:45:30,901 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 18:45:30,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:45:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 18:45:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-10-23 18:45:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:45:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-10-23 18:45:30,919 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2020-10-23 18:45:30,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:30,920 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-10-23 18:45:30,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:45:30,920 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-10-23 18:45:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:45:30,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:30,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:31,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:45:31,124 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2133232275, now seen corresponding path program 1 times [2020-10-23 18:45:31,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:31,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557041221] [2020-10-23 18:45:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:31,574 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2020-10-23 18:45:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:31,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:31,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557041221] [2020-10-23 18:45:31,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981147848] [2020-10-23 18:45:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-23 18:45:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:31,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:32,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:32,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-10-23 18:45:32,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41689446] [2020-10-23 18:45:32,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:45:32,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:32,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:45:32,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:45:32,004 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 15 states. [2020-10-23 18:45:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:33,045 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2020-10-23 18:45:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 18:45:33,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-10-23 18:45:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:33,047 INFO L225 Difference]: With dead ends: 71 [2020-10-23 18:45:33,048 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 18:45:33,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:45:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 18:45:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-23 18:45:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 18:45:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-23 18:45:33,065 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2020-10-23 18:45:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:33,066 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-23 18:45:33,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:45:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-23 18:45:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 18:45:33,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:33,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:33,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:33,282 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:33,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2071956506, now seen corresponding path program 1 times [2020-10-23 18:45:33,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:33,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130526709] [2020-10-23 18:45:33,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:45:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:45:33,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130526709] [2020-10-23 18:45:33,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448107634] [2020-10-23 18:45:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-23 18:45:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:34,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:45:34,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:34,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-10-23 18:45:34,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648338068] [2020-10-23 18:45:34,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:45:34,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:34,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:45:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:45:34,293 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 19 states. [2020-10-23 18:45:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:35,673 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-10-23 18:45:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:45:35,673 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-10-23 18:45:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:35,675 INFO L225 Difference]: With dead ends: 84 [2020-10-23 18:45:35,675 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 18:45:35,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:45:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 18:45:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-23 18:45:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 18:45:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-23 18:45:35,691 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 43 [2020-10-23 18:45:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:35,692 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-23 18:45:35,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:45:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-23 18:45:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-23 18:45:35,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:35,694 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:35,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:35,910 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash 239444478, now seen corresponding path program 1 times [2020-10-23 18:45:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:35,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510785660] [2020-10-23 18:45:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:45:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:45:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:45:36,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510785660] [2020-10-23 18:45:36,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21234856] [2020-10-23 18:45:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:36,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-23 18:45:36,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:37,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-23 18:45:37,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:37,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-10-23 18:45:37,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797342544] [2020-10-23 18:45:37,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:45:37,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:37,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:45:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:45:37,348 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 23 states. [2020-10-23 18:45:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:38,951 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-10-23 18:45:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 18:45:38,955 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-23 18:45:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:38,957 INFO L225 Difference]: With dead ends: 96 [2020-10-23 18:45:38,957 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 18:45:38,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:45:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 18:45:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-23 18:45:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 18:45:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-23 18:45:38,973 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 56 [2020-10-23 18:45:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:38,973 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-23 18:45:38,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:45:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-23 18:45:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 18:45:38,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:38,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:39,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:39,190 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:39,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1042694284, now seen corresponding path program 1 times [2020-10-23 18:45:39,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:39,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126806306] [2020-10-23 18:45:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:45:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:45:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:45:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:45:39,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126806306] [2020-10-23 18:45:39,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191317354] [2020-10-23 18:45:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:40,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-23 18:45:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:40,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-23 18:45:40,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:40,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-10-23 18:45:40,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462496129] [2020-10-23 18:45:40,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:45:40,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:45:40,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:45:40,651 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 27 states. [2020-10-23 18:45:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:42,567 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-10-23 18:45:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:45:42,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-10-23 18:45:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:42,570 INFO L225 Difference]: With dead ends: 107 [2020-10-23 18:45:42,570 INFO L226 Difference]: Without dead ends: 90 [2020-10-23 18:45:42,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:45:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-23 18:45:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-23 18:45:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 18:45:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-23 18:45:42,596 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 68 [2020-10-23 18:45:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:42,597 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-23 18:45:42,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:45:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-23 18:45:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 18:45:42,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:42,602 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:42,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:45:42,820 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:42,821 INFO L82 PathProgramCache]: Analyzing trace with hash -551918093, now seen corresponding path program 1 times [2020-10-23 18:45:42,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:42,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977480097] [2020-10-23 18:45:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:45:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:45:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:45:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-23 18:45:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:45:43,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977480097] [2020-10-23 18:45:43,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423387270] [2020-10-23 18:45:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2020-10-23 18:45:43,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:44,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:45:44,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:44,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-10-23 18:45:44,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949846760] [2020-10-23 18:45:44,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 18:45:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 18:45:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:45:44,585 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 31 states. [2020-10-23 18:45:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:49,198 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2020-10-23 18:45:49,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:45:49,198 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2020-10-23 18:45:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:49,201 INFO L225 Difference]: With dead ends: 117 [2020-10-23 18:45:49,201 INFO L226 Difference]: Without dead ends: 100 [2020-10-23 18:45:49,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 18:45:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-23 18:45:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-23 18:45:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-23 18:45:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-23 18:45:49,217 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 79 [2020-10-23 18:45:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:49,219 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-23 18:45:49,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 18:45:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-23 18:45:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 18:45:49,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:49,221 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:49,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:49,428 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1233397436, now seen corresponding path program 1 times [2020-10-23 18:45:49,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:49,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520280472] [2020-10-23 18:45:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:45:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:45:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:45:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-23 18:45:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-23 18:45:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 18:45:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520280472] [2020-10-23 18:45:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952042740] [2020-10-23 18:45:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2020-10-23 18:45:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:51,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 18:45:51,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:51,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-10-23 18:45:51,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577716879] [2020-10-23 18:45:51,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 18:45:51,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 18:45:51,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:45:51,326 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 35 states. [2020-10-23 18:45:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:53,773 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2020-10-23 18:45:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 18:45:53,774 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 89 [2020-10-23 18:45:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:53,775 INFO L225 Difference]: With dead ends: 126 [2020-10-23 18:45:53,776 INFO L226 Difference]: Without dead ends: 109 [2020-10-23 18:45:53,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=307, Invalid=2449, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 18:45:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-23 18:45:53,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-23 18:45:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-23 18:45:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-23 18:45:53,804 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 89 [2020-10-23 18:45:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:53,804 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-23 18:45:53,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 18:45:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-23 18:45:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-23 18:45:53,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:53,807 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:54,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:54,019 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1557996702, now seen corresponding path program 1 times [2020-10-23 18:45:54,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:54,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162763979] [2020-10-23 18:45:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:45:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:45:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:45:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:45:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-23 18:45:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-23 18:45:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:54,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-23 18:45:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-23 18:45:55,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162763979] [2020-10-23 18:45:55,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724927052] [2020-10-23 18:45:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:55,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-23 18:45:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:56,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:45:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-23 18:45:56,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:56,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-10-23 18:45:56,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433433931] [2020-10-23 18:45:56,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-23 18:45:56,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-23 18:45:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 18:45:56,142 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 39 states. [2020-10-23 18:46:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:46:01,748 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2020-10-23 18:46:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 18:46:01,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 98 [2020-10-23 18:46:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:46:01,752 INFO L225 Difference]: With dead ends: 144 [2020-10-23 18:46:01,752 INFO L226 Difference]: Without dead ends: 127 [2020-10-23 18:46:01,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=395, Invalid=3265, Unknown=0, NotChecked=0, Total=3660 [2020-10-23 18:46:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-23 18:46:01,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-10-23 18:46:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-23 18:46:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-23 18:46:01,773 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 98 [2020-10-23 18:46:01,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:46:01,774 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-23 18:46:01,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-23 18:46:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-23 18:46:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-23 18:46:01,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:46:01,777 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 7, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:46:01,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:46:01,982 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:46:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:46:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1260201894, now seen corresponding path program 2 times [2020-10-23 18:46:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:46:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147941892] [2020-10-23 18:46:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:46:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:46:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:46:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:46:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:46:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:46:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-23 18:46:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-23 18:46:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-23 18:46:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-23 18:46:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 18:46:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 36 proven. 218 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-23 18:46:02,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147941892] [2020-10-23 18:46:02,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18519715] [2020-10-23 18:46:02,390 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 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 [2020-10-23 18:46:02,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:46:02,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:46:02,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 61 conjunts are in the unsatisfiable core [2020-10-23 18:46:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:46:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 18 proven. 236 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-23 18:46:03,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:46:03,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 25] total 36 [2020-10-23 18:46:03,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360620063] [2020-10-23 18:46:03,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 18:46:03,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:46:03,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 18:46:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 18:46:03,808 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 36 states. [2020-10-23 18:46:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:46:06,696 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2020-10-23 18:46:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 18:46:06,702 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 114 [2020-10-23 18:46:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:46:06,703 INFO L225 Difference]: With dead ends: 144 [2020-10-23 18:46:06,703 INFO L226 Difference]: Without dead ends: 127 [2020-10-23 18:46:06,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=200, Invalid=3106, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 18:46:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-23 18:46:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-10-23 18:46:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-23 18:46:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2020-10-23 18:46:06,718 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 114 [2020-10-23 18:46:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:46:06,718 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2020-10-23 18:46:06,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 18:46:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2020-10-23 18:46:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-23 18:46:06,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:46:06,721 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 8, 7, 6, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:46:06,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:46:06,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:46:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:46:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash 63950658, now seen corresponding path program 3 times [2020-10-23 18:46:06,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:46:06,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202588440] [2020-10-23 18:46:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:46:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:46:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:46:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 18:46:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 18:46:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-23 18:46:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-23 18:46:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-23 18:46:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-23 18:46:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-10-23 18:46:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:07,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-23 18:46:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:46:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-23 18:46:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202588440] [2020-10-23 18:46:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306130138] [2020-10-23 18:46:08,060 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 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