/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/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:56:32,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:56:32,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:56:32,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:56:32,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:56:32,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:56:32,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:56:32,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:56:32,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:56:32,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:56:32,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:56:32,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:56:32,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:56:32,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:56:32,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:56:32,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:56:32,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:56:32,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:56:32,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:56:32,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:56:32,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:56:32,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:56:32,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:56:32,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:56:32,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:56:32,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:56:32,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:56:32,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:56:32,529 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 17:56:32,588 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:56:32,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:56:32,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:56:32,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:56:32,592 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:56:32,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:56:32,593 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:56:32,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:56:32,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:56:32,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:56:32,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:56:32,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:56:32,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:56:32,595 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:56:32,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:56:32,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:56:32,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:56:32,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:56:32,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:56:32,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:56:32,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:56:32,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:56:32,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:56:32,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:56:32,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:56:32,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:56:32,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:56:32,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:56:32,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:56:32,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:56:32,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:56:33,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:56:33,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:56:33,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:56:33,013 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:56:33,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-10-23 17:56:33,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4aab6e9f/6d1f2ad6b9804bbab972913b5990af02/FLAG2c4d250b4 [2020-10-23 17:56:33,806 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:56:33,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-10-23 17:56:33,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4aab6e9f/6d1f2ad6b9804bbab972913b5990af02/FLAG2c4d250b4 [2020-10-23 17:56:34,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4aab6e9f/6d1f2ad6b9804bbab972913b5990af02 [2020-10-23 17:56:34,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:56:34,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:56:34,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:34,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:56:34,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:56:34,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6698eaf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34, skipping insertion in model container [2020-10-23 17:56:34,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:56:34,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:56:34,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:34,473 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:56:34,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:34,538 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:56:34,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34 WrapperNode [2020-10-23 17:56:34,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:34,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:56:34,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:56:34,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:56:34,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (1/1) ... [2020-10-23 17:56:34,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:56:34,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:56:34,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:56:34,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:56:34,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (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 17:56:34,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:56:34,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:56:34,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:56:34,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 17:56:34,740 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-10-23 17:56:34,740 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-10-23 17:56:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-10-23 17:56:34,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:56:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:56:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:56:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:56:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:56:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 17:56:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 17:56:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 17:56:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-10-23 17:56:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-10-23 17:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-10-23 17:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:56:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:56:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:56:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:56:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:56:35,435 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:56:35,436 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 17:56:35,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:35 BoogieIcfgContainer [2020-10-23 17:56:35,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:56:35,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:56:35,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:56:35,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:56:35,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:56:34" (1/3) ... [2020-10-23 17:56:35,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735effb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:35, skipping insertion in model container [2020-10-23 17:56:35,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:34" (2/3) ... [2020-10-23 17:56:35,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735effb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:35, skipping insertion in model container [2020-10-23 17:56:35,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:35" (3/3) ... [2020-10-23 17:56:35,447 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-10-23 17:56:35,458 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:56:35,464 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:56:35,477 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:56:35,506 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:56:35,506 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:56:35,507 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:56:35,507 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:56:35,507 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:56:35,507 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:56:35,507 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:56:35,508 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:56:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-10-23 17:56:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-23 17:56:35,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:35,535 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:35,535 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1471639594, now seen corresponding path program 1 times [2020-10-23 17:56:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:35,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740921648] [2020-10-23 17:56:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 17:56:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 17:56:36,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740921648] [2020-10-23 17:56:36,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:36,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 17:56:36,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783935686] [2020-10-23 17:56:36,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:56:36,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:36,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:56:36,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 17:56:36,066 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 4 states. [2020-10-23 17:56:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:36,666 INFO L93 Difference]: Finished difference Result 124 states and 181 transitions. [2020-10-23 17:56:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 17:56:36,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-10-23 17:56:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:36,683 INFO L225 Difference]: With dead ends: 124 [2020-10-23 17:56:36,683 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 17:56:36,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 17:56:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 17:56:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-23 17:56:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 17:56:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-23 17:56:36,762 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 50 [2020-10-23 17:56:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:36,763 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-23 17:56:36,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:56:36,764 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2020-10-23 17:56:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 17:56:36,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:36,767 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:36,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:56:36,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash -32852944, now seen corresponding path program 1 times [2020-10-23 17:56:36,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:36,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808364347] [2020-10-23 17:56:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:36,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 17:56:36,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808364347] [2020-10-23 17:56:36,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:36,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 17:56:36,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641510865] [2020-10-23 17:56:36,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 17:56:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:36,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 17:56:36,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 17:56:36,946 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand 5 states. [2020-10-23 17:56:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:37,418 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-10-23 17:56:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 17:56:37,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-10-23 17:56:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:37,423 INFO L225 Difference]: With dead ends: 67 [2020-10-23 17:56:37,424 INFO L226 Difference]: Without dead ends: 54 [2020-10-23 17:56:37,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-23 17:56:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-23 17:56:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 17:56:37,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2020-10-23 17:56:37,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 52 [2020-10-23 17:56:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:37,452 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2020-10-23 17:56:37,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 17:56:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2020-10-23 17:56:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 17:56:37,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:37,457 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:37,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:56:37,458 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1621200846, now seen corresponding path program 1 times [2020-10-23 17:56:37,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:37,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077161792] [2020-10-23 17:56:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:37,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077161792] [2020-10-23 17:56:37,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036984097] [2020-10-23 17:56:37,712 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 17:56:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:56:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:56:38,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:38,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2020-10-23 17:56:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119507149] [2020-10-23 17:56:38,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 17:56:38,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:38,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 17:56:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:38,199 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand 8 states. [2020-10-23 17:56:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:38,348 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-10-23 17:56:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:56:38,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-23 17:56:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:38,353 INFO L225 Difference]: With dead ends: 92 [2020-10-23 17:56:38,353 INFO L226 Difference]: Without dead ends: 81 [2020-10-23 17:56:38,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-23 17:56:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-10-23 17:56:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 17:56:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2020-10-23 17:56:38,379 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 52 [2020-10-23 17:56:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:38,379 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2020-10-23 17:56:38,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 17:56:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2020-10-23 17:56:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 17:56:38,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:38,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:38,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 17:56:38,595 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2086960436, now seen corresponding path program 1 times [2020-10-23 17:56:38,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:38,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357287287] [2020-10-23 17:56:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:38,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357287287] [2020-10-23 17:56:38,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968784687] [2020-10-23 17:56:38,771 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 17:56:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:38,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 17:56:38,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:56:38,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:38,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2020-10-23 17:56:38,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370017084] [2020-10-23 17:56:38,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:56:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:38,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:56:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:38,984 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 7 states. [2020-10-23 17:56:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:39,119 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2020-10-23 17:56:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:56:39,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-23 17:56:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:39,122 INFO L225 Difference]: With dead ends: 78 [2020-10-23 17:56:39,123 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 17:56:39,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-23 17:56:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 17:56:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-23 17:56:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 17:56:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2020-10-23 17:56:39,143 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 52 [2020-10-23 17:56:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:39,143 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2020-10-23 17:56:39,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:56:39,143 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2020-10-23 17:56:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 17:56:39,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:39,145 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:39,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:39,361 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:39,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1785057200, now seen corresponding path program 1 times [2020-10-23 17:56:39,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:39,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924163788] [2020-10-23 17:56:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:39,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:39,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:39,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:39,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 17:56:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924163788] [2020-10-23 17:56:39,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:39,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 17:56:39,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071513583] [2020-10-23 17:56:39,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 17:56:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 17:56:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:39,474 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand 7 states. [2020-10-23 17:56:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:40,239 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2020-10-23 17:56:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 17:56:40,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-23 17:56:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:40,243 INFO L225 Difference]: With dead ends: 76 [2020-10-23 17:56:40,243 INFO L226 Difference]: Without dead ends: 69 [2020-10-23 17:56:40,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-23 17:56:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-23 17:56:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-23 17:56:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2020-10-23 17:56:40,265 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 54 [2020-10-23 17:56:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:40,268 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2020-10-23 17:56:40,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 17:56:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2020-10-23 17:56:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-23 17:56:40,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:40,270 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:40,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 17:56:40,274 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash 734902734, now seen corresponding path program 1 times [2020-10-23 17:56:40,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:40,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727276004] [2020-10-23 17:56:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:56:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727276004] [2020-10-23 17:56:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841190369] [2020-10-23 17:56:40,440 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 17:56:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 17:56:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-23 17:56:40,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:40,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2020-10-23 17:56:40,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654516822] [2020-10-23 17:56:40,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 17:56:40,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:40,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 17:56:40,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:56:40,587 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand 6 states. [2020-10-23 17:56:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:40,649 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2020-10-23 17:56:40,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:56:40,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-23 17:56:40,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:40,654 INFO L225 Difference]: With dead ends: 84 [2020-10-23 17:56:40,654 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 17:56:40,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 17:56:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-10-23 17:56:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 17:56:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2020-10-23 17:56:40,677 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 54 [2020-10-23 17:56:40,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:40,677 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2020-10-23 17:56:40,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 17:56:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2020-10-23 17:56:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-23 17:56:40,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:40,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:40,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:40,894 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1519846109, now seen corresponding path program 1 times [2020-10-23 17:56:40,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:40,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559732189] [2020-10-23 17:56:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:40,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:41,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:41,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:41,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 17:56:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559732189] [2020-10-23 17:56:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487454858] [2020-10-23 17:56:41,021 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 17:56:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:41,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 17:56:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 17:56:41,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:41,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10] total 13 [2020-10-23 17:56:41,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006461396] [2020-10-23 17:56:41,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 17:56:41,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 17:56:41,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:41,283 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 13 states. [2020-10-23 17:56:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:42,968 INFO L93 Difference]: Finished difference Result 173 states and 244 transitions. [2020-10-23 17:56:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 17:56:42,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-23 17:56:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:42,971 INFO L225 Difference]: With dead ends: 173 [2020-10-23 17:56:42,971 INFO L226 Difference]: Without dead ends: 113 [2020-10-23 17:56:42,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2020-10-23 17:56:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-23 17:56:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-10-23 17:56:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-23 17:56:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 134 transitions. [2020-10-23 17:56:43,014 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 134 transitions. Word has length 56 [2020-10-23 17:56:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:43,014 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 134 transitions. [2020-10-23 17:56:43,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 17:56:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 134 transitions. [2020-10-23 17:56:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-23 17:56:43,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:43,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:43,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:43,218 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1896083609, now seen corresponding path program 1 times [2020-10-23 17:56:43,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:43,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693433138] [2020-10-23 17:56:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 17:56:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 17:56:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 17:56:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693433138] [2020-10-23 17:56:43,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108159430] [2020-10-23 17:56:43,346 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 17:56:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 17:56:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:43,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:43,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-10-23 17:56:43,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549763655] [2020-10-23 17:56:43,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:56:43,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:43,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:56:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 17:56:43,480 INFO L87 Difference]: Start difference. First operand 98 states and 134 transitions. Second operand 4 states. [2020-10-23 17:56:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:43,561 INFO L93 Difference]: Finished difference Result 188 states and 254 transitions. [2020-10-23 17:56:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 17:56:43,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-23 17:56:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:43,565 INFO L225 Difference]: With dead ends: 188 [2020-10-23 17:56:43,565 INFO L226 Difference]: Without dead ends: 107 [2020-10-23 17:56:43,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-23 17:56:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-23 17:56:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-23 17:56:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-23 17:56:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2020-10-23 17:56:43,607 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 62 [2020-10-23 17:56:43,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:43,608 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2020-10-23 17:56:43,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:56:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2020-10-23 17:56:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-23 17:56:43,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:43,610 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:43,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:43,811 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:43,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:43,812 INFO L82 PathProgramCache]: Analyzing trace with hash -75763656, now seen corresponding path program 1 times [2020-10-23 17:56:43,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:43,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677149105] [2020-10-23 17:56:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-23 17:56:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 17:56:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 17:56:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:43,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677149105] [2020-10-23 17:56:43,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517217235] [2020-10-23 17:56:43,995 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 17:56:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 17:56:44,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:44,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:44,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-10-23 17:56:44,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356171229] [2020-10-23 17:56:44,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 17:56:44,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 17:56:44,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:56:44,119 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 5 states. [2020-10-23 17:56:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:44,256 INFO L93 Difference]: Finished difference Result 217 states and 299 transitions. [2020-10-23 17:56:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:56:44,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-23 17:56:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:44,259 INFO L225 Difference]: With dead ends: 217 [2020-10-23 17:56:44,262 INFO L226 Difference]: Without dead ends: 130 [2020-10-23 17:56:44,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-23 17:56:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 113. [2020-10-23 17:56:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-23 17:56:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 154 transitions. [2020-10-23 17:56:44,294 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 154 transitions. Word has length 64 [2020-10-23 17:56:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:44,294 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 154 transitions. [2020-10-23 17:56:44,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 17:56:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 154 transitions. [2020-10-23 17:56:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 17:56:44,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:44,298 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:44,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:44,514 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:44,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:44,515 INFO L82 PathProgramCache]: Analyzing trace with hash 732774376, now seen corresponding path program 1 times [2020-10-23 17:56:44,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:44,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850874405] [2020-10-23 17:56:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-23 17:56:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-23 17:56:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 17:56:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:44,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850874405] [2020-10-23 17:56:44,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863310892] [2020-10-23 17:56:44,623 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 17:56:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 17:56:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:44,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:44,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-23 17:56:44,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628200029] [2020-10-23 17:56:44,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 17:56:44,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 17:56:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:56:44,778 INFO L87 Difference]: Start difference. First operand 113 states and 154 transitions. Second operand 9 states. [2020-10-23 17:56:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:45,388 INFO L93 Difference]: Finished difference Result 223 states and 312 transitions. [2020-10-23 17:56:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:56:45,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-10-23 17:56:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:45,391 INFO L225 Difference]: With dead ends: 223 [2020-10-23 17:56:45,391 INFO L226 Difference]: Without dead ends: 130 [2020-10-23 17:56:45,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-23 17:56:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2020-10-23 17:56:45,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-23 17:56:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2020-10-23 17:56:45,411 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 65 [2020-10-23 17:56:45,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:45,411 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2020-10-23 17:56:45,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 17:56:45,411 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2020-10-23 17:56:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 17:56:45,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:45,413 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:45,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 17:56:45,627 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:45,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1324439609, now seen corresponding path program 1 times [2020-10-23 17:56:45,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:45,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081177896] [2020-10-23 17:56:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-23 17:56:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 17:56:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-23 17:56:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:45,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081177896] [2020-10-23 17:56:45,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717549232] [2020-10-23 17:56:45,842 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 17:56:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 17:56:45,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:46,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:46,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-23 17:56:46,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290981028] [2020-10-23 17:56:46,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 17:56:46,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 17:56:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:46,004 INFO L87 Difference]: Start difference. First operand 123 states and 169 transitions. Second operand 11 states. [2020-10-23 17:56:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:47,150 INFO L93 Difference]: Finished difference Result 243 states and 339 transitions. [2020-10-23 17:56:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 17:56:47,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-23 17:56:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:47,153 INFO L225 Difference]: With dead ends: 243 [2020-10-23 17:56:47,153 INFO L226 Difference]: Without dead ends: 143 [2020-10-23 17:56:47,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-10-23 17:56:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-23 17:56:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2020-10-23 17:56:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-23 17:56:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2020-10-23 17:56:47,175 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 67 [2020-10-23 17:56:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:47,176 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2020-10-23 17:56:47,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 17:56:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2020-10-23 17:56:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 17:56:47,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:47,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:47,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-23 17:56:47,389 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:47,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 678525497, now seen corresponding path program 2 times [2020-10-23 17:56:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:47,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83923540] [2020-10-23 17:56:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 17:56:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-23 17:56:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 17:56:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:47,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83923540] [2020-10-23 17:56:47,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969803925] [2020-10-23 17:56:47,544 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 17:56:47,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:56:47,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 17:56:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:47,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:47,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-23 17:56:47,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507043249] [2020-10-23 17:56:47,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 17:56:47,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 17:56:47,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:56:47,827 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand 11 states. [2020-10-23 17:56:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:48,496 INFO L93 Difference]: Finished difference Result 243 states and 341 transitions. [2020-10-23 17:56:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 17:56:48,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-23 17:56:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:48,498 INFO L225 Difference]: With dead ends: 243 [2020-10-23 17:56:48,499 INFO L226 Difference]: Without dead ends: 143 [2020-10-23 17:56:48,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:56:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-23 17:56:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2020-10-23 17:56:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-23 17:56:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 177 transitions. [2020-10-23 17:56:48,520 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 177 transitions. Word has length 68 [2020-10-23 17:56:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:48,522 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 177 transitions. [2020-10-23 17:56:48,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 17:56:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 177 transitions. [2020-10-23 17:56:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-23 17:56:48,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:48,524 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:48,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:48,733 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1918004776, now seen corresponding path program 2 times [2020-10-23 17:56:48,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:48,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140475804] [2020-10-23 17:56:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:48,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:48,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:48,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:48,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-23 17:56:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:48,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 17:56:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:48,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-23 17:56:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:48,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140475804] [2020-10-23 17:56:48,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779760811] [2020-10-23 17:56:48,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:49,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:56:49,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 17:56:49,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:49,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:49,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-23 17:56:49,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351807192] [2020-10-23 17:56:49,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 17:56:49,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:49,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 17:56:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:49,699 INFO L87 Difference]: Start difference. First operand 129 states and 177 transitions. Second operand 13 states. [2020-10-23 17:56:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:50,737 INFO L93 Difference]: Finished difference Result 256 states and 357 transitions. [2020-10-23 17:56:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 17:56:50,738 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-10-23 17:56:50,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:50,740 INFO L225 Difference]: With dead ends: 256 [2020-10-23 17:56:50,740 INFO L226 Difference]: Without dead ends: 153 [2020-10-23 17:56:50,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-23 17:56:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-23 17:56:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2020-10-23 17:56:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-23 17:56:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2020-10-23 17:56:50,765 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 70 [2020-10-23 17:56:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:50,766 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2020-10-23 17:56:50,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 17:56:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2020-10-23 17:56:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-23 17:56:50,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:50,768 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:50,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:50,973 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:50,974 INFO L82 PathProgramCache]: Analyzing trace with hash -542125496, now seen corresponding path program 3 times [2020-10-23 17:56:50,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:50,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43054487] [2020-10-23 17:56:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 17:56:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-23 17:56:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 17:56:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:51,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43054487] [2020-10-23 17:56:51,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536867557] [2020-10-23 17:56:51,138 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:51,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 17:56:51,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-23 17:56:51,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-23 17:56:51,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:51,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-10-23 17:56:51,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933209833] [2020-10-23 17:56:51,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 17:56:51,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:51,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 17:56:51,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:51,449 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand 15 states. [2020-10-23 17:56:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:55,520 INFO L93 Difference]: Finished difference Result 298 states and 432 transitions. [2020-10-23 17:56:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 17:56:55,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-23 17:56:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:55,524 INFO L225 Difference]: With dead ends: 298 [2020-10-23 17:56:55,524 INFO L226 Difference]: Without dead ends: 195 [2020-10-23 17:56:55,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 17:56:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-23 17:56:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 162. [2020-10-23 17:56:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-23 17:56:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 230 transitions. [2020-10-23 17:56:55,549 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 230 transitions. Word has length 71 [2020-10-23 17:56:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:55,567 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 230 transitions. [2020-10-23 17:56:55,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 17:56:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 230 transitions. [2020-10-23 17:56:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 17:56:55,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:55,570 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:55,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 17:56:55,777 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:55,778 INFO L82 PathProgramCache]: Analyzing trace with hash 836361701, now seen corresponding path program 1 times [2020-10-23 17:56:55,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:55,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449935126] [2020-10-23 17:56:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:55,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:55,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:55,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:55,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-23 17:56:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:55,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-23 17:56:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:55,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 17:56:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:56,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449935126] [2020-10-23 17:56:56,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63160497] [2020-10-23 17:56:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:56,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:56:56,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:56,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:56,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-10-23 17:56:56,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045836247] [2020-10-23 17:56:56,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 17:56:56,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:56,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 17:56:56,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:56,211 INFO L87 Difference]: Start difference. First operand 162 states and 230 transitions. Second operand 15 states. [2020-10-23 17:56:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:57,773 INFO L93 Difference]: Finished difference Result 323 states and 467 transitions. [2020-10-23 17:56:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 17:56:57,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-10-23 17:56:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:57,776 INFO L225 Difference]: With dead ends: 323 [2020-10-23 17:56:57,776 INFO L226 Difference]: Without dead ends: 190 [2020-10-23 17:56:57,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-23 17:56:57,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-23 17:56:57,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2020-10-23 17:56:57,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-23 17:56:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 233 transitions. [2020-10-23 17:56:57,810 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 233 transitions. Word has length 73 [2020-10-23 17:56:57,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:57,810 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 233 transitions. [2020-10-23 17:56:57,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 17:56:57,811 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 233 transitions. [2020-10-23 17:56:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-23 17:56:57,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:57,813 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:58,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-23 17:56:58,026 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash -488831081, now seen corresponding path program 1 times [2020-10-23 17:56:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:58,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994171855] [2020-10-23 17:56:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 17:56:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 17:56:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-23 17:56:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:56:58,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994171855] [2020-10-23 17:56:58,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715080181] [2020-10-23 17:56:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 17:56:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:56:58,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:58,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-10-23 17:56:58,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135694692] [2020-10-23 17:56:58,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 17:56:58,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 17:56:58,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:58,365 INFO L87 Difference]: Start difference. First operand 164 states and 233 transitions. Second operand 15 states. [2020-10-23 17:56:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:59,580 INFO L93 Difference]: Finished difference Result 329 states and 487 transitions. [2020-10-23 17:56:59,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 17:56:59,581 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-23 17:56:59,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:59,583 INFO L225 Difference]: With dead ends: 329 [2020-10-23 17:56:59,584 INFO L226 Difference]: Without dead ends: 196 [2020-10-23 17:56:59,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-10-23 17:56:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-23 17:56:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 168. [2020-10-23 17:56:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-23 17:56:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 238 transitions. [2020-10-23 17:56:59,608 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 238 transitions. Word has length 74 [2020-10-23 17:56:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:59,609 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 238 transitions. [2020-10-23 17:56:59,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 17:56:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 238 transitions. [2020-10-23 17:56:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-23 17:56:59,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:59,611 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:59,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 17:56:59,825 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1788135626, now seen corresponding path program 2 times [2020-10-23 17:56:59,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:59,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355218097] [2020-10-23 17:56:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:59,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:59,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 17:57:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 17:57:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-23 17:57:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:00,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355218097] [2020-10-23 17:57:00,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139661501] [2020-10-23 17:57:00,062 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:00,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:00,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:00,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 17:57:00,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:00,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:00,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-23 17:57:00,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499713802] [2020-10-23 17:57:00,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 17:57:00,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 17:57:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:57:00,370 INFO L87 Difference]: Start difference. First operand 168 states and 238 transitions. Second operand 17 states. [2020-10-23 17:57:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:02,600 INFO L93 Difference]: Finished difference Result 336 states and 485 transitions. [2020-10-23 17:57:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 17:57:02,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-23 17:57:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:02,604 INFO L225 Difference]: With dead ends: 336 [2020-10-23 17:57:02,604 INFO L226 Difference]: Without dead ends: 200 [2020-10-23 17:57:02,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2020-10-23 17:57:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-23 17:57:02,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 170. [2020-10-23 17:57:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-23 17:57:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 241 transitions. [2020-10-23 17:57:02,628 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 241 transitions. Word has length 76 [2020-10-23 17:57:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:02,628 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 241 transitions. [2020-10-23 17:57:02,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 17:57:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 241 transitions. [2020-10-23 17:57:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-23 17:57:02,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:02,630 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:02,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:02,835 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash -243869594, now seen corresponding path program 2 times [2020-10-23 17:57:02,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:02,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299493618] [2020-10-23 17:57:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:02,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:03,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-23 17:57:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:03,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 17:57:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:03,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-23 17:57:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:03,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299493618] [2020-10-23 17:57:03,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833865048] [2020-10-23 17:57:03,035 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:03,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:03,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:03,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 17:57:03,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:03,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:03,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-23 17:57:03,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209881657] [2020-10-23 17:57:03,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 17:57:03,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:03,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 17:57:03,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:57:03,754 INFO L87 Difference]: Start difference. First operand 170 states and 241 transitions. Second operand 17 states. [2020-10-23 17:57:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:08,699 INFO L93 Difference]: Finished difference Result 345 states and 513 transitions. [2020-10-23 17:57:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 17:57:08,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-10-23 17:57:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:08,703 INFO L225 Difference]: With dead ends: 345 [2020-10-23 17:57:08,703 INFO L226 Difference]: Without dead ends: 209 [2020-10-23 17:57:08,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2020-10-23 17:57:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-23 17:57:08,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2020-10-23 17:57:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-23 17:57:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 246 transitions. [2020-10-23 17:57:08,729 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 246 transitions. Word has length 77 [2020-10-23 17:57:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:08,730 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 246 transitions. [2020-10-23 17:57:08,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 17:57:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 246 transitions. [2020-10-23 17:57:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-23 17:57:08,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:08,732 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:08,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 17:57:08,936 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1691619397, now seen corresponding path program 3 times [2020-10-23 17:57:08,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:08,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581525351] [2020-10-23 17:57:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:08,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:08,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:09,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:09,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 17:57:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:09,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 17:57:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:09,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-23 17:57:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-23 17:57:09,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581525351] [2020-10-23 17:57:09,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222532552] [2020-10-23 17:57:09,216 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:09,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 17:57:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:09,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 17:57:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-10-23 17:57:09,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:09,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-10-23 17:57:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452160709] [2020-10-23 17:57:09,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 17:57:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 17:57:09,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-23 17:57:09,884 INFO L87 Difference]: Start difference. First operand 174 states and 246 transitions. Second operand 18 states. [2020-10-23 17:57:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:13,457 INFO L93 Difference]: Finished difference Result 343 states and 495 transitions. [2020-10-23 17:57:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-23 17:57:13,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-23 17:57:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:13,461 INFO L225 Difference]: With dead ends: 343 [2020-10-23 17:57:13,461 INFO L226 Difference]: Without dead ends: 203 [2020-10-23 17:57:13,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 17:57:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-23 17:57:13,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 158. [2020-10-23 17:57:13,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-23 17:57:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2020-10-23 17:57:13,483 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 79 [2020-10-23 17:57:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:13,484 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2020-10-23 17:57:13,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 17:57:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2020-10-23 17:57:13,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 17:57:13,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:13,486 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:13,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:13,690 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1741364071, now seen corresponding path program 1 times [2020-10-23 17:57:13,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:13,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426073527] [2020-10-23 17:57:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:13,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:13,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:13,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 17:57:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:13,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-23 17:57:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:13,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-23 17:57:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:13,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-23 17:57:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:13,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426073527] [2020-10-23 17:57:13,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350411347] [2020-10-23 17:57:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-23 17:57:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-23 17:57:14,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:14,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-10-23 17:57:14,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876778853] [2020-10-23 17:57:14,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 17:57:14,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 17:57:14,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:57:14,207 INFO L87 Difference]: Start difference. First operand 158 states and 216 transitions. Second operand 19 states. [2020-10-23 17:57:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:15,575 INFO L93 Difference]: Finished difference Result 331 states and 468 transitions. [2020-10-23 17:57:15,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 17:57:15,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-10-23 17:57:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:15,579 INFO L225 Difference]: With dead ends: 331 [2020-10-23 17:57:15,580 INFO L226 Difference]: Without dead ends: 209 [2020-10-23 17:57:15,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=421, Invalid=769, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 17:57:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-23 17:57:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 163. [2020-10-23 17:57:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-23 17:57:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 223 transitions. [2020-10-23 17:57:15,602 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 223 transitions. Word has length 81 [2020-10-23 17:57:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:15,602 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 223 transitions. [2020-10-23 17:57:15,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 17:57:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 223 transitions. [2020-10-23 17:57:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-23 17:57:15,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:15,605 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:15,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:15,811 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash -367701990, now seen corresponding path program 1 times [2020-10-23 17:57:15,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:15,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862211478] [2020-10-23 17:57:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 17:57:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 17:57:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 17:57:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-23 17:57:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-23 17:57:15,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862211478] [2020-10-23 17:57:15,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293474781] [2020-10-23 17:57:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 17:57:16,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-23 17:57:16,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:57:16,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-10-23 17:57:16,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829364241] [2020-10-23 17:57:16,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:57:16,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:57:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-23 17:57:16,166 INFO L87 Difference]: Start difference. First operand 163 states and 223 transitions. Second operand 4 states. [2020-10-23 17:57:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:16,304 INFO L93 Difference]: Finished difference Result 276 states and 377 transitions. [2020-10-23 17:57:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 17:57:16,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-23 17:57:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:16,308 INFO L225 Difference]: With dead ends: 276 [2020-10-23 17:57:16,308 INFO L226 Difference]: Without dead ends: 167 [2020-10-23 17:57:16,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-23 17:57:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2020-10-23 17:57:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-23 17:57:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 202 transitions. [2020-10-23 17:57:16,333 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 202 transitions. Word has length 83 [2020-10-23 17:57:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:16,333 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 202 transitions. [2020-10-23 17:57:16,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:57:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 202 transitions. [2020-10-23 17:57:16,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-23 17:57:16,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:16,336 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:16,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-23 17:57:16,550 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1179335753, now seen corresponding path program 1 times [2020-10-23 17:57:16,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:16,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382532844] [2020-10-23 17:57:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-23 17:57:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-23 17:57:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-23 17:57:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:16,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382532844] [2020-10-23 17:57:16,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440686214] [2020-10-23 17:57:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:16,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 17:57:16,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:57:17,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:17,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-10-23 17:57:17,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953510126] [2020-10-23 17:57:17,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 17:57:17,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:17,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 17:57:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-23 17:57:17,186 INFO L87 Difference]: Start difference. First operand 153 states and 202 transitions. Second operand 21 states. [2020-10-23 17:57:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:19,694 INFO L93 Difference]: Finished difference Result 316 states and 423 transitions. [2020-10-23 17:57:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 17:57:19,695 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 86 [2020-10-23 17:57:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:19,697 INFO L225 Difference]: With dead ends: 316 [2020-10-23 17:57:19,697 INFO L226 Difference]: Without dead ends: 201 [2020-10-23 17:57:19,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=1283, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 17:57:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-23 17:57:19,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2020-10-23 17:57:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-23 17:57:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 205 transitions. [2020-10-23 17:57:19,719 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 205 transitions. Word has length 86 [2020-10-23 17:57:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:19,720 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 205 transitions. [2020-10-23 17:57:19,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 17:57:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 205 transitions. [2020-10-23 17:57:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 17:57:19,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:19,722 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:19,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:19,938 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash -979749319, now seen corresponding path program 1 times [2020-10-23 17:57:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:19,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368909246] [2020-10-23 17:57:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:19,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:19,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:19,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-23 17:57:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-23 17:57:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-23 17:57:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 87 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:20,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368909246] [2020-10-23 17:57:20,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716222519] [2020-10-23 17:57:20,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-23 17:57:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 26 proven. 77 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:57:20,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:20,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-10-23 17:57:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202027314] [2020-10-23 17:57:20,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 17:57:20,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 17:57:20,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-23 17:57:20,499 INFO L87 Difference]: Start difference. First operand 155 states and 205 transitions. Second operand 21 states. [2020-10-23 17:57:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:22,128 INFO L93 Difference]: Finished difference Result 337 states and 470 transitions. [2020-10-23 17:57:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 17:57:22,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-23 17:57:22,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:22,131 INFO L225 Difference]: With dead ends: 337 [2020-10-23 17:57:22,131 INFO L226 Difference]: Without dead ends: 222 [2020-10-23 17:57:22,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=959, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 17:57:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-23 17:57:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 159. [2020-10-23 17:57:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-23 17:57:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2020-10-23 17:57:22,156 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 87 [2020-10-23 17:57:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:22,157 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2020-10-23 17:57:22,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 17:57:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2020-10-23 17:57:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-23 17:57:22,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:22,159 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:22,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-23 17:57:22,373 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:22,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:22,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2002825576, now seen corresponding path program 2 times [2020-10-23 17:57:22,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:22,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455410932] [2020-10-23 17:57:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:22,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:22,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:22,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:22,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 17:57:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:22,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-23 17:57:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:22,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-23 17:57:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 95 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:22,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455410932] [2020-10-23 17:57:22,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072343854] [2020-10-23 17:57:22,716 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:22,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:22,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-23 17:57:22,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 27 proven. 84 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:57:23,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:23,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-23 17:57:23,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547016512] [2020-10-23 17:57:23,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 17:57:23,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:23,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 17:57:23,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-23 17:57:23,248 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand 23 states. [2020-10-23 17:57:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:26,506 INFO L93 Difference]: Finished difference Result 329 states and 440 transitions. [2020-10-23 17:57:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 17:57:26,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2020-10-23 17:57:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:26,510 INFO L225 Difference]: With dead ends: 329 [2020-10-23 17:57:26,510 INFO L226 Difference]: Without dead ends: 211 [2020-10-23 17:57:26,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 17:57:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-23 17:57:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 161. [2020-10-23 17:57:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-23 17:57:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 213 transitions. [2020-10-23 17:57:26,533 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 213 transitions. Word has length 89 [2020-10-23 17:57:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:26,533 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 213 transitions. [2020-10-23 17:57:26,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 17:57:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 213 transitions. [2020-10-23 17:57:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-23 17:57:26,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:26,535 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:26,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-23 17:57:26,739 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -842502710, now seen corresponding path program 2 times [2020-10-23 17:57:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:26,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351279783] [2020-10-23 17:57:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:26,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-23 17:57:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-23 17:57:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-23 17:57:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 110 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:26,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351279783] [2020-10-23 17:57:26,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573173832] [2020-10-23 17:57:26,972 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:42,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:57:42,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 17:57:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 26 proven. 100 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:57:42,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:42,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-23 17:57:42,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006376241] [2020-10-23 17:57:42,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 17:57:42,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 17:57:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2020-10-23 17:57:42,704 INFO L87 Difference]: Start difference. First operand 161 states and 213 transitions. Second operand 23 states. [2020-10-23 17:57:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:44,282 INFO L93 Difference]: Finished difference Result 353 states and 494 transitions. [2020-10-23 17:57:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 17:57:44,283 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-10-23 17:57:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:44,286 INFO L225 Difference]: With dead ends: 353 [2020-10-23 17:57:44,286 INFO L226 Difference]: Without dead ends: 235 [2020-10-23 17:57:44,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1170, Unknown=0, NotChecked=0, Total=1806 [2020-10-23 17:57:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-23 17:57:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 165. [2020-10-23 17:57:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-23 17:57:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 218 transitions. [2020-10-23 17:57:44,313 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 218 transitions. Word has length 90 [2020-10-23 17:57:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:44,313 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 218 transitions. [2020-10-23 17:57:44,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 17:57:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 218 transitions. [2020-10-23 17:57:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 17:57:44,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:44,315 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:44,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:44,519 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1042146793, now seen corresponding path program 3 times [2020-10-23 17:57:44,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:44,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436752289] [2020-10-23 17:57:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:44,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:44,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:44,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:44,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-23 17:57:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:44,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-23 17:57:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:44,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-23 17:57:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 119 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436752289] [2020-10-23 17:57:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285984302] [2020-10-23 17:57:44,879 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:45,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-23 17:57:45,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:57:45,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:57:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-10-23 17:57:45,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:45,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-10-23 17:57:45,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712291492] [2020-10-23 17:57:45,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 17:57:45,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:45,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 17:57:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-10-23 17:57:45,359 INFO L87 Difference]: Start difference. First operand 165 states and 218 transitions. Second operand 20 states. [2020-10-23 17:57:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:48,457 INFO L93 Difference]: Finished difference Result 363 states and 499 transitions. [2020-10-23 17:57:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 17:57:48,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-23 17:57:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:48,463 INFO L225 Difference]: With dead ends: 363 [2020-10-23 17:57:48,463 INFO L226 Difference]: Without dead ends: 248 [2020-10-23 17:57:48,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=1275, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 17:57:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-23 17:57:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 196. [2020-10-23 17:57:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-23 17:57:48,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 267 transitions. [2020-10-23 17:57:48,491 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 267 transitions. Word has length 92 [2020-10-23 17:57:48,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:48,491 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 267 transitions. [2020-10-23 17:57:48,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 17:57:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 267 transitions. [2020-10-23 17:57:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 17:57:48,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:48,494 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:48,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-23 17:57:48,699 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:48,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1958708137, now seen corresponding path program 1 times [2020-10-23 17:57:48,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:48,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878211281] [2020-10-23 17:57:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-23 17:57:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-23 17:57:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-23 17:57:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:48,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878211281] [2020-10-23 17:57:48,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956611299] [2020-10-23 17:57:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 17:57:49,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 26 proven. 126 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:57:49,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:49,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-10-23 17:57:49,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361534523] [2020-10-23 17:57:49,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 17:57:49,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:49,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 17:57:49,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2020-10-23 17:57:49,302 INFO L87 Difference]: Start difference. First operand 196 states and 267 transitions. Second operand 25 states. [2020-10-23 17:57:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:51,675 INFO L93 Difference]: Finished difference Result 433 states and 638 transitions. [2020-10-23 17:57:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 17:57:51,677 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 93 [2020-10-23 17:57:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:51,680 INFO L225 Difference]: With dead ends: 433 [2020-10-23 17:57:51,680 INFO L226 Difference]: Without dead ends: 282 [2020-10-23 17:57:51,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=760, Invalid=1402, Unknown=0, NotChecked=0, Total=2162 [2020-10-23 17:57:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-23 17:57:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 201. [2020-10-23 17:57:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-23 17:57:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 274 transitions. [2020-10-23 17:57:51,715 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 274 transitions. Word has length 93 [2020-10-23 17:57:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:51,716 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 274 transitions. [2020-10-23 17:57:51,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 17:57:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 274 transitions. [2020-10-23 17:57:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 17:57:51,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:51,718 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:51,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:51,931 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:51,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1211335498, now seen corresponding path program 1 times [2020-10-23 17:57:51,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:51,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581596579] [2020-10-23 17:57:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:51,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:51,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:51,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:52,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-23 17:57:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:52,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-23 17:57:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:52,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-23 17:57:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 146 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581596579] [2020-10-23 17:57:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717049725] [2020-10-23 17:57:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:57:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:52,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-23 17:57:52,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:57:52,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:52,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2020-10-23 17:57:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831032504] [2020-10-23 17:57:52,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 17:57:52,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 17:57:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2020-10-23 17:57:52,880 INFO L87 Difference]: Start difference. First operand 201 states and 274 transitions. Second operand 27 states. [2020-10-23 17:57:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:56,939 INFO L93 Difference]: Finished difference Result 416 states and 573 transitions. [2020-10-23 17:57:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 17:57:56,940 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 95 [2020-10-23 17:57:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:56,945 INFO L225 Difference]: With dead ends: 416 [2020-10-23 17:57:56,945 INFO L226 Difference]: Without dead ends: 262 [2020-10-23 17:57:56,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 17:57:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-23 17:57:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 203. [2020-10-23 17:57:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-23 17:57:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 277 transitions. [2020-10-23 17:57:56,979 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 277 transitions. Word has length 95 [2020-10-23 17:57:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:56,979 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 277 transitions. [2020-10-23 17:57:56,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 17:57:56,980 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 277 transitions. [2020-10-23 17:57:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-23 17:57:56,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:56,981 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:57,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-23 17:57:57,194 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1508834520, now seen corresponding path program 2 times [2020-10-23 17:57:57,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:57,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743477777] [2020-10-23 17:57:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:57:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:57:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-23 17:57:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 17:57:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-23 17:57:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-23 17:57:57,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743477777] [2020-10-23 17:57:57,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151146848] [2020-10-23 17:57:57,480 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true