/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 0.2.0-7d8eed3 [2020-11-06 22:47:00,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:47:00,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:47:00,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:47:00,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:47:00,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:47:00,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:47:00,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:47:00,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:47:00,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:47:00,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:47:00,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:47:00,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:47:00,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:47:00,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:47:00,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:47:00,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:47:00,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:47:00,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:47:00,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:47:00,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:47:00,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:47:00,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:47:00,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:47:00,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:47:00,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:47:00,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:47:00,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:47:00,963 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:47:00,990 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:47:00,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:47:00,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:47:00,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:47:00,993 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:47:00,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:47:00,993 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:47:00,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:47:00,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:47:00,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:47:00,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:47:00,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:47:00,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:47:00,995 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:47:00,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:47:00,996 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:47:00,996 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:47:00,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:47:00,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:47:00,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:47:00,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:47:00,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:47:00,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:47:00,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:47:00,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:47:00,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:47:00,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:47:00,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:47:00,999 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:47:00,999 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:47:01,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:47:01,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:47:01,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:47:01,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:47:01,391 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:47:01,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-11-06 22:47:01,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16321e2d5/e553406bb2784ab5a5fe594ef985f6c9/FLAGa43390350 [2020-11-06 22:47:02,182 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:47:02,183 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2020-11-06 22:47:02,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16321e2d5/e553406bb2784ab5a5fe594ef985f6c9/FLAGa43390350 [2020-11-06 22:47:02,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16321e2d5/e553406bb2784ab5a5fe594ef985f6c9 [2020-11-06 22:47:02,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:47:02,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:47:02,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:02,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:47:02,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:47:02,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6177d2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02, skipping insertion in model container [2020-11-06 22:47:02,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:47:02,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:47:02,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:02,794 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:47:02,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:02,838 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:47:02,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02 WrapperNode [2020-11-06 22:47:02,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:02,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:47:02,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:47:02,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:47:02,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... [2020-11-06 22:47:02,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:47:02,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:47:02,883 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:47:02,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:47:02,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:47:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:47:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:47:02,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:47:02,971 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:47:02,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:47:02,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:47:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:47:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:47:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:47:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:47:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:47:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:47:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:47:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:47:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:47:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:47:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:47:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:47:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:47:02,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:47:03,484 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:47:03,485 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:47:03,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:03 BoogieIcfgContainer [2020-11-06 22:47:03,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:47:03,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:47:03,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:47:03,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:47:03,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:02" (1/3) ... [2020-11-06 22:47:03,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56373b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:03, skipping insertion in model container [2020-11-06 22:47:03,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:02" (2/3) ... [2020-11-06 22:47:03,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56373b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:03, skipping insertion in model container [2020-11-06 22:47:03,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:03" (3/3) ... [2020-11-06 22:47:03,531 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.c [2020-11-06 22:47:03,551 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:47:03,556 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:47:03,570 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:47:03,615 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:47:03,615 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:47:03,616 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:47:03,616 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:47:03,616 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:47:03,616 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:47:03,616 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:47:03,616 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:47:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-06 22:47:03,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:47:03,648 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:03,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:03,649 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:03,662 INFO L82 PathProgramCache]: Analyzing trace with hash 317129214, now seen corresponding path program 1 times [2020-11-06 22:47:03,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:03,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069457004] [2020-11-06 22:47:03,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:04,249 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-11-06 22:47:04,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:04,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069457004] [2020-11-06 22:47:04,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:47:04,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:47:04,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164533581] [2020-11-06 22:47:04,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:47:04,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:47:04,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:47:04,386 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 8 states. [2020-11-06 22:47:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:07,292 INFO L93 Difference]: Finished difference Result 70 states and 99 transitions. [2020-11-06 22:47:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:47:07,294 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-06 22:47:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:07,305 INFO L225 Difference]: With dead ends: 70 [2020-11-06 22:47:07,305 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:47:07,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:47:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:47:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:47:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:47:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-06 22:47:07,377 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-11-06 22:47:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:07,378 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-06 22:47:07,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:47:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-06 22:47:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:47:07,380 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:07,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:07,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:47:07,381 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash -811039358, now seen corresponding path program 1 times [2020-11-06 22:47:07,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:07,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262523058] [2020-11-06 22:47:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262523058] [2020-11-06 22:47:07,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233653373] [2020-11-06 22:47:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:07,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:47:07,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:07,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:07,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:47:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48836532] [2020-11-06 22:47:07,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:47:07,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:47:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:47:07,781 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-11-06 22:47:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:12,323 INFO L93 Difference]: Finished difference Result 68 states and 97 transitions. [2020-11-06 22:47:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:47:12,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-06 22:47:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:12,329 INFO L225 Difference]: With dead ends: 68 [2020-11-06 22:47:12,329 INFO L226 Difference]: Without dead ends: 51 [2020-11-06 22:47:12,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:47:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-06 22:47:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-11-06 22:47:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:47:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-11-06 22:47:12,363 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2020-11-06 22:47:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:12,364 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-11-06 22:47:12,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:47:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-11-06 22:47:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:47:12,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:12,368 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] [2020-11-06 22:47:12,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:47:12,587 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2133232275, now seen corresponding path program 1 times [2020-11-06 22:47:12,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:12,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811419293] [2020-11-06 22:47:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:13,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811419293] [2020-11-06 22:47:13,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555618304] [2020-11-06 22:47:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:13,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-06 22:47:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:13,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:47:13,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:13,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-11-06 22:47:13,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934279231] [2020-11-06 22:47:13,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:47:13,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:13,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:47:13,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:47:13,440 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 15 states. [2020-11-06 22:47:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:14,398 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2020-11-06 22:47:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:47:14,399 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-11-06 22:47:14,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:14,400 INFO L225 Difference]: With dead ends: 71 [2020-11-06 22:47:14,401 INFO L226 Difference]: Without dead ends: 54 [2020-11-06 22:47:14,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:47:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-06 22:47:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-06 22:47:14,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-06 22:47:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-11-06 22:47:14,436 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 29 [2020-11-06 22:47:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:14,436 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-11-06 22:47:14,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:47:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-11-06 22:47:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:47:14,438 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:14,438 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] [2020-11-06 22:47:14,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:14,652 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2071956506, now seen corresponding path program 1 times [2020-11-06 22:47:14,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:14,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999215502] [2020-11-06 22:47:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:15,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:15,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:47:15,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999215502] [2020-11-06 22:47:15,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364736075] [2020-11-06 22:47:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:15,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-06 22:47:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:15,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:47:15,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:15,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2020-11-06 22:47:15,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173824649] [2020-11-06 22:47:15,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-06 22:47:15,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:15,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-06 22:47:15,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:47:15,842 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 19 states. [2020-11-06 22:47:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:17,276 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-11-06 22:47:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:47:17,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-11-06 22:47:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:17,279 INFO L225 Difference]: With dead ends: 84 [2020-11-06 22:47:17,280 INFO L226 Difference]: Without dead ends: 67 [2020-11-06 22:47:17,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:47:17,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-06 22:47:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-11-06 22:47:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-06 22:47:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-11-06 22:47:17,309 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 43 [2020-11-06 22:47:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:17,310 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-11-06 22:47:17,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-06 22:47:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-11-06 22:47:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-06 22:47:17,313 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:17,315 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] [2020-11-06 22:47:17,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:17,531 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash 239444478, now seen corresponding path program 1 times [2020-11-06 22:47:17,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:17,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549400437] [2020-11-06 22:47:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:47:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:47:18,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549400437] [2020-11-06 22:47:18,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801433534] [2020-11-06 22:47:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-06 22:47:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:18,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-06 22:47:18,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:18,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2020-11-06 22:47:18,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682948489] [2020-11-06 22:47:18,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 22:47:18,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:18,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 22:47:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:47:18,748 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 23 states. [2020-11-06 22:47:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:20,407 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-11-06 22:47:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-06 22:47:20,413 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-11-06 22:47:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:20,415 INFO L225 Difference]: With dead ends: 96 [2020-11-06 22:47:20,415 INFO L226 Difference]: Without dead ends: 79 [2020-11-06 22:47:20,416 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 [2020-11-06 22:47:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-06 22:47:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-06 22:47:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-06 22:47:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-11-06 22:47:20,447 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 56 [2020-11-06 22:47:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:20,448 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-11-06 22:47:20,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 22:47:20,450 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-11-06 22:47:20,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-06 22:47:20,451 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:20,451 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] [2020-11-06 22:47:20,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:20,666 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1042694284, now seen corresponding path program 1 times [2020-11-06 22:47:20,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:20,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043786725] [2020-11-06 22:47:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:47:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:47:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:47:21,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043786725] [2020-11-06 22:47:21,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801414575] [2020-11-06 22:47:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:21,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-06 22:47:21,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:22,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-06 22:47:22,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:22,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-11-06 22:47:22,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340966781] [2020-11-06 22:47:22,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-06 22:47:22,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:22,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-06 22:47:22,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:47:22,137 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 27 states. [2020-11-06 22:47:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:24,079 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2020-11-06 22:47:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:47:24,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-11-06 22:47:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:24,082 INFO L225 Difference]: With dead ends: 107 [2020-11-06 22:47:24,082 INFO L226 Difference]: Without dead ends: 90 [2020-11-06 22:47:24,084 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 [2020-11-06 22:47:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-06 22:47:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-11-06 22:47:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-06 22:47:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-11-06 22:47:24,100 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 68 [2020-11-06 22:47:24,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:24,101 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-11-06 22:47:24,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-06 22:47:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-11-06 22:47:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-06 22:47:24,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:24,105 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] [2020-11-06 22:47:24,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:47:24,306 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash -551918093, now seen corresponding path program 1 times [2020-11-06 22:47:24,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:24,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975967824] [2020-11-06 22:47:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:47:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:47:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-11-06 22:47:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:47:25,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975967824] [2020-11-06 22:47:25,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422494122] [2020-11-06 22:47:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2020-11-06 22:47:25,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:25,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:47:26,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:26,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2020-11-06 22:47:26,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290145891] [2020-11-06 22:47:26,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-06 22:47:26,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:26,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-06 22:47:26,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2020-11-06 22:47:26,043 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 31 states. [2020-11-06 22:47:28,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:28,757 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2020-11-06 22:47:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-06 22:47:28,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 79 [2020-11-06 22:47:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:28,760 INFO L225 Difference]: With dead ends: 117 [2020-11-06 22:47:28,760 INFO L226 Difference]: Without dead ends: 100 [2020-11-06 22:47:28,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2020-11-06 22:47:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-06 22:47:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-11-06 22:47:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-06 22:47:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-11-06 22:47:28,804 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 79 [2020-11-06 22:47:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:28,805 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-11-06 22:47:28,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-06 22:47:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-11-06 22:47:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-06 22:47:28,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:28,814 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] [2020-11-06 22:47:29,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:29,030 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1233397436, now seen corresponding path program 1 times [2020-11-06 22:47:29,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:29,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920957240] [2020-11-06 22:47:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:47:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:47:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-11-06 22:47:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-06 22:47:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-06 22:47:30,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920957240] [2020-11-06 22:47:30,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286892944] [2020-11-06 22:47:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2020-11-06 22:47:30,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:30,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 12 proven. 134 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-11-06 22:47:31,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:31,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2020-11-06 22:47:31,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594490437] [2020-11-06 22:47:31,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-06 22:47:31,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:31,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-06 22:47:31,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2020-11-06 22:47:31,098 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 35 states. [2020-11-06 22:47:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:33,697 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2020-11-06 22:47:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:47:33,698 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 89 [2020-11-06 22:47:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:33,701 INFO L225 Difference]: With dead ends: 126 [2020-11-06 22:47:33,701 INFO L226 Difference]: Without dead ends: 109 [2020-11-06 22:47:33,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=307, Invalid=2449, Unknown=0, NotChecked=0, Total=2756 [2020-11-06 22:47:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-06 22:47:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-11-06 22:47:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-06 22:47:33,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-11-06 22:47:33,719 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 89 [2020-11-06 22:47:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:33,720 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-11-06 22:47:33,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-06 22:47:33,720 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-11-06 22:47:33,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-06 22:47:33,721 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:33,722 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] [2020-11-06 22:47:33,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:33,935 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:33,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1557996702, now seen corresponding path program 1 times [2020-11-06 22:47:33,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:33,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60931167] [2020-11-06 22:47:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:47:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:47:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-11-06 22:47:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-06 22:47:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-06 22:47:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-06 22:47:34,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60931167] [2020-11-06 22:47:34,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950435316] [2020-11-06 22:47:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:35,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 53 conjunts are in the unsatisfiable core [2020-11-06 22:47:35,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:36,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-06 22:47:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-06 22:47:36,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:36,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-11-06 22:47:36,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473597588] [2020-11-06 22:47:36,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-06 22:47:36,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:36,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-06 22:47:36,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-11-06 22:47:36,170 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 39 states. [2020-11-06 22:47:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:42,028 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2020-11-06 22:47:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:47:42,029 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 98 [2020-11-06 22:47:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:42,032 INFO L225 Difference]: With dead ends: 144 [2020-11-06 22:47:42,032 INFO L226 Difference]: Without dead ends: 127 [2020-11-06 22:47:42,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=395, Invalid=3265, Unknown=0, NotChecked=0, Total=3660 [2020-11-06 22:47:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-06 22:47:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2020-11-06 22:47:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-06 22:47:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-11-06 22:47:42,062 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 98 [2020-11-06 22:47:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:42,063 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-11-06 22:47:42,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-06 22:47:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-11-06 22:47:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-11-06 22:47:42,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:42,073 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] [2020-11-06 22:47:42,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:47:42,287 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:42,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1260201894, now seen corresponding path program 2 times [2020-11-06 22:47:42,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:42,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234277819] [2020-11-06 22:47:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:47:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:47:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-11-06 22:47:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-06 22:47:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-06 22:47:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-11-06 22:47:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-06 22:47:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 36 proven. 218 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-06 22:47:42,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234277819] [2020-11-06 22:47:42,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286914893] [2020-11-06 22:47:42,650 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 [2020-11-06 22:47:42,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:47:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:47:42,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 61 conjunts are in the unsatisfiable core [2020-11-06 22:47:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 18 proven. 236 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-06 22:47:44,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:47:44,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 25] total 36 [2020-11-06 22:47:44,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594865346] [2020-11-06 22:47:44,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-06 22:47:44,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-06 22:47:44,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2020-11-06 22:47:44,217 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 36 states. [2020-11-06 22:47:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:47,367 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2020-11-06 22:47:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-06 22:47:47,368 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 114 [2020-11-06 22:47:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:47,370 INFO L225 Difference]: With dead ends: 144 [2020-11-06 22:47:47,370 INFO L226 Difference]: Without dead ends: 127 [2020-11-06 22:47:47,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=200, Invalid=3106, Unknown=0, NotChecked=0, Total=3306 [2020-11-06 22:47:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-06 22:47:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2020-11-06 22:47:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-06 22:47:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2020-11-06 22:47:47,386 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 114 [2020-11-06 22:47:47,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:47,387 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2020-11-06 22:47:47,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-06 22:47:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2020-11-06 22:47:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-11-06 22:47:47,389 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:47,389 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] [2020-11-06 22:47:47,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:47,603 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:47,604 INFO L82 PathProgramCache]: Analyzing trace with hash 63950658, now seen corresponding path program 3 times [2020-11-06 22:47:47,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:47,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246036595] [2020-11-06 22:47:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:47:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:47:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-06 22:47:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-11-06 22:47:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:47:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-11-06 22:47:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-11-06 22:47:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-06 22:47:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-11-06 22:47:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-11-06 22:47:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 18 proven. 255 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-11-06 22:47:48,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246036595] [2020-11-06 22:47:48,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102325258] [2020-11-06 22:47:48,721 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