/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:01:57,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:01:57,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:01:57,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 13:01:57,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 13:01:57,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 13:01:57,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 13:01:57,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 13:01:57,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 13:01:57,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 13:01:57,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 13:01:57,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 13:01:57,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:01:57,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:01:57,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:01:57,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:01:57,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:01:57,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:01:57,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:01:57,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:01:57,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:01:57,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:01:57,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:01:57,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:01:57,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 13:01:57,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 13:01:57,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 13:01:57,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 13:01:57,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 13:01:57,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 13:01:57,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 13:01:57,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 13:01:57,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 13:01:57,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 13:01:57,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 13:01:57,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 13:01:57,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 13:01:57,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 13:01:57,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:01:57,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:01:57,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:01:57,555 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 [2021-05-02 13:01:57,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:01:57,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:01:57,592 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:01:57,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:01:57,593 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:01:57,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:01:57,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:01:57,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:01:57,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:01:57,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:01:57,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:01:57,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:01:57,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:01:57,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:01:57,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:01:57,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:01:57,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:01:57,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:01:57,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:01:57,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:01:57,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:01:57,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:01:57,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:01:57,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:01:57,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:01:57,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:01:57,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:01:57,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:01:57,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:01:57,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:01:57,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:01:57,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:01:57,927 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:01:57,928 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:01:57,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-02 13:01:57,990 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a0da0c7a/96a3c95a7cf74e05882f4a4e272a412e/FLAG241b3c7fd [2021-05-02 13:01:58,407 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:01:58,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2021-05-02 13:01:58,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a0da0c7a/96a3c95a7cf74e05882f4a4e272a412e/FLAG241b3c7fd [2021-05-02 13:01:58,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a0da0c7a/96a3c95a7cf74e05882f4a4e272a412e [2021-05-02 13:01:58,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:01:58,435 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:01:58,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:01:58,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:01:58,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:01:58,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11c62d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58, skipping insertion in model container [2021-05-02 13:01:58,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:01:58,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:01:58,599 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2021-05-02 13:01:58,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:01:58,616 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:01:58,627 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c[456,469] [2021-05-02 13:01:58,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:01:58,643 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:01:58,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58 WrapperNode [2021-05-02 13:01:58,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:01:58,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:01:58,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:01:58,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:01:58,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (1/1) ... [2021-05-02 13:01:58,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:01:58,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:01:58,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:01:58,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:01:58,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (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 [2021-05-02 13:01:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:01:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:01:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:01:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:01:58,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:01:58,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:01:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:01:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:01:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:01:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:01:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:01:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:01:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:01:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:01:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:01:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:01:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:01:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:01:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:01:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:01:58,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:01:58,986 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:01:58,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:01:58 BoogieIcfgContainer [2021-05-02 13:01:58,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:01:58,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:01:58,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:01:58,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:01:58,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:01:58" (1/3) ... [2021-05-02 13:01:58,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0d841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:01:58, skipping insertion in model container [2021-05-02 13:01:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:01:58" (2/3) ... [2021-05-02 13:01:58,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0d841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:01:58, skipping insertion in model container [2021-05-02 13:01:58,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:01:58" (3/3) ... [2021-05-02 13:01:58,994 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2021-05-02 13:01:58,998 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:01:59,001 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:01:59,014 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:01:59,030 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:01:59,030 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:01:59,030 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:01:59,030 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:01:59,031 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:01:59,031 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:01:59,031 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:01:59,031 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:01:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:01:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:01:59,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:59,047 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:59,048 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:59,056 INFO L82 PathProgramCache]: Analyzing trace with hash -380103047, now seen corresponding path program 1 times [2021-05-02 13:01:59,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:59,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236577565] [2021-05-02 13:01:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:59,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:59,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:59,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236577565] [2021-05-02 13:01:59,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236577565] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:01:59,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:01:59,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:01:59,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009405375] [2021-05-02 13:01:59,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:01:59,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:01:59,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:01:59,304 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:01:59,505 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-05-02 13:01:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:01:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:01:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:01:59,513 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:01:59,513 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 13:01:59,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:01:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 13:01:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 13:01:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 13:01:59,548 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 13:01:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:01:59,549 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 13:01:59,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:01:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 13:01:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 13:01:59,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:01:59,550 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:01:59,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:01:59,550 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:01:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:01:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash 437044508, now seen corresponding path program 1 times [2021-05-02 13:01:59,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:01:59,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163584884] [2021-05-02 13:01:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:01:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:59,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:01:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:59,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:01:59,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163584884] [2021-05-02 13:01:59,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163584884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:59,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614609796] [2021-05-02 13:01:59,709 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 [2021-05-02 13:01:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:01:59,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:01:59,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:01:59,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:59,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:59,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:01:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:01:59,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614609796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:01:59,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:01:59,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-02 13:01:59,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299951410] [2021-05-02 13:01:59,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:01:59,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:01:59,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:01:59,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:01:59,859 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:00,040 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 13:02:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:02:00,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 13:02:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:00,042 INFO L225 Difference]: With dead ends: 24 [2021-05-02 13:02:00,042 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 13:02:00,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:02:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 13:02:00,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 13:02:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 13:02:00,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2021-05-02 13:02:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:00,048 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 13:02:00,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 13:02:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 13:02:00,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:00,048 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:00,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:02:00,271 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash -263170305, now seen corresponding path program 2 times [2021-05-02 13:02:00,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:00,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208750467] [2021-05-02 13:02:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:00,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:00,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:00,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208750467] [2021-05-02 13:02:00,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208750467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:00,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504934471] [2021-05-02 13:02:00,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:00,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:00,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:00,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:02:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:00,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:00,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:00,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:00,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:00,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504934471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:00,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:00,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-05-02 13:02:00,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673894701] [2021-05-02 13:02:00,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:02:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:02:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:02:00,612 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:00,836 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-02 13:02:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:02:00,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 13:02:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:00,837 INFO L225 Difference]: With dead ends: 26 [2021-05-02 13:02:00,837 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 13:02:00,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:02:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 13:02:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 13:02:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-05-02 13:02:00,842 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2021-05-02 13:02:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:00,842 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-05-02 13:02:00,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-05-02 13:02:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:02:00,843 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:00,843 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:01,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:01,067 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:01,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:01,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1140259874, now seen corresponding path program 3 times [2021-05-02 13:02:01,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:01,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018798911] [2021-05-02 13:02:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:01,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:01,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:01,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018798911] [2021-05-02 13:02:01,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018798911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:01,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430397282] [2021-05-02 13:02:01,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:01,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:02:01,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:02:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:01,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:01,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430397282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:01,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:01,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-02 13:02:01,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420938547] [2021-05-02 13:02:01,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:02:01,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:01,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:02:01,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:02:01,357 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:01,617 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-02 13:02:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:02:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 13:02:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:01,619 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:02:01,619 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 13:02:01,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:02:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 13:02:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 13:02:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-05-02 13:02:01,624 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2021-05-02 13:02:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:01,624 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-05-02 13:02:01,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-05-02 13:02:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 13:02:01,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:01,625 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:01,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:01,841 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1216930949, now seen corresponding path program 4 times [2021-05-02 13:02:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:01,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422715446] [2021-05-02 13:02:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:01,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:01,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:01,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422715446] [2021-05-02 13:02:01,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422715446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:01,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587569351] [2021-05-02 13:02:01,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:01,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:01,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:02:01,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:02,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587569351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:02,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:02,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-05-02 13:02:02,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184373769] [2021-05-02 13:02:02,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 13:02:02,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 13:02:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:02:02,114 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:02,697 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2021-05-02 13:02:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:02:02,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-05-02 13:02:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:02,699 INFO L225 Difference]: With dead ends: 38 [2021-05-02 13:02:02,699 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 13:02:02,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-05-02 13:02:02,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 13:02:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-05-02 13:02:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-02 13:02:02,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2021-05-02 13:02:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:02,704 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-02 13:02:02,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 15 states have internal predecessors, (31), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-02 13:02:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:02:02,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:02,705 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:02,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:02,922 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1883389992, now seen corresponding path program 5 times [2021-05-02 13:02:02,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:02,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137168503] [2021-05-02 13:02:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:03,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:03,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:03,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137168503] [2021-05-02 13:02:03,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137168503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:03,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260017570] [2021-05-02 13:02:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:03,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 13:02:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:02:03,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:03,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:03,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260017570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:03,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:03,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-02 13:02:03,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561163207] [2021-05-02 13:02:03,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:02:03,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:02:03,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:02:03,273 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:03,568 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-05-02 13:02:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:02:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 13:02:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:03,570 INFO L225 Difference]: With dead ends: 32 [2021-05-02 13:02:03,570 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 13:02:03,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 327.6ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:02:03,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 13:02:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 13:02:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-05-02 13:02:03,575 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 22 [2021-05-02 13:02:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:03,575 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-05-02 13:02:03,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-05-02 13:02:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 13:02:03,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:03,576 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:03,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:02:03,793 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1894564085, now seen corresponding path program 6 times [2021-05-02 13:02:03,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:03,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161802773] [2021-05-02 13:02:03,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:03,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:03,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:03,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161802773] [2021-05-02 13:02:03,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161802773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:03,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624974663] [2021-05-02 13:02:03,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:03,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 13:02:03,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:02:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:03,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:03,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:04,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624974663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:04,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:04,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-02 13:02:04,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093338733] [2021-05-02 13:02:04,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:02:04,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:02:04,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:02:04,100 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:04,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:04,503 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-05-02 13:02:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:02:04,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 13:02:04,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:04,504 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:02:04,504 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 13:02:04,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=233, Invalid=417, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:02:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 13:02:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 13:02:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-05-02 13:02:04,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 24 [2021-05-02 13:02:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:04,510 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-05-02 13:02:04,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-05-02 13:02:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 13:02:04,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:04,511 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:04,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:04,735 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:04,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1033900334, now seen corresponding path program 7 times [2021-05-02 13:02:04,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:04,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316602593] [2021-05-02 13:02:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:04,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:04,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:04,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316602593] [2021-05-02 13:02:04,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316602593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:04,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176144861] [2021-05-02 13:02:04,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:02:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:04,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:04,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:05,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176144861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:05,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:05,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-02 13:02:05,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708224940] [2021-05-02 13:02:05,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 13:02:05,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:05,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 13:02:05,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 13:02:05,085 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:05,506 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-05-02 13:02:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:02:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 13:02:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:05,507 INFO L225 Difference]: With dead ends: 36 [2021-05-02 13:02:05,507 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:02:05,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:02:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:02:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 13:02:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2021-05-02 13:02:05,513 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 26 [2021-05-02 13:02:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:05,514 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2021-05-02 13:02:05,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2021-05-02 13:02:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 13:02:05,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:05,514 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:05,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:05,737 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:05,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2084628113, now seen corresponding path program 8 times [2021-05-02 13:02:05,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:05,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375300889] [2021-05-02 13:02:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:05,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:05,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:05,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:05,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375300889] [2021-05-02 13:02:05,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375300889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:05,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989334555] [2021-05-02 13:02:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:05,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:05,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:02:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:05,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:05,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:06,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989334555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:06,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:06,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-02 13:02:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821929085] [2021-05-02 13:02:06,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:02:06,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:02:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:02:06,083 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:06,487 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 13:02:06,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:02:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 13:02:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:06,488 INFO L225 Difference]: With dead ends: 38 [2021-05-02 13:02:06,488 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 13:02:06,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:02:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 13:02:06,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 13:02:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-05-02 13:02:06,493 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 28 [2021-05-02 13:02:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:06,494 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-05-02 13:02:06,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-05-02 13:02:06,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 13:02:06,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:06,495 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:06,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 13:02:06,712 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1778258124, now seen corresponding path program 9 times [2021-05-02 13:02:06,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:06,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231364315] [2021-05-02 13:02:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:06,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:06,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231364315] [2021-05-02 13:02:06,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231364315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:06,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61708850] [2021-05-02 13:02:06,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:06,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 13:02:06,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:06,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:02:06,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:06,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:06,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:07,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61708850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:07,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:07,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-02 13:02:07,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386356259] [2021-05-02 13:02:07,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 13:02:07,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 13:02:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:02:07,091 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:07,552 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 13:02:07,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:02:07,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 13:02:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:07,553 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:02:07,553 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 13:02:07,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=419, Invalid=771, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:02:07,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 13:02:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 13:02:07,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 13:02:07,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 30 [2021-05-02 13:02:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:07,559 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 13:02:07,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 22 states have internal predecessors, (47), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 13:02:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:02:07,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:07,560 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:07,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:07,765 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1134779159, now seen corresponding path program 10 times [2021-05-02 13:02:07,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:07,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299162211] [2021-05-02 13:02:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:07,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:07,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299162211] [2021-05-02 13:02:07,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299162211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364586595] [2021-05-02 13:02:07,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:07,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:07,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:02:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:08,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364586595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:08,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:08,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 29 [2021-05-02 13:02:08,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188566399] [2021-05-02 13:02:08,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 13:02:08,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 13:02:08,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-02 13:02:08,198 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:09,601 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2021-05-02 13:02:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:02:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-05-02 13:02:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:09,604 INFO L225 Difference]: With dead ends: 62 [2021-05-02 13:02:09,604 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:02:09,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1247.7ms TimeCoverageRelationStatistics Valid=464, Invalid=2086, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 13:02:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:02:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2021-05-02 13:02:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 13:02:09,622 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 32 [2021-05-02 13:02:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:09,623 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 13:02:09,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 13:02:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 13:02:09,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:09,628 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:09,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:09,845 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash 244931130, now seen corresponding path program 11 times [2021-05-02 13:02:09,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:09,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320318832] [2021-05-02 13:02:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:10,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:10,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:10,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320318832] [2021-05-02 13:02:10,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320318832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:10,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844480556] [2021-05-02 13:02:10,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:10,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 13:02:10,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:02:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:10,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844480556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:10,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:10,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-02 13:02:10,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933678776] [2021-05-02 13:02:10,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:02:10,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:02:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:02:10,327 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:10,826 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2021-05-02 13:02:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 13:02:10,826 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 13:02:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:10,827 INFO L225 Difference]: With dead ends: 44 [2021-05-02 13:02:10,827 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:02:10,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 620.1ms TimeCoverageRelationStatistics Valid=573, Invalid=1067, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:02:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:02:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 13:02:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-05-02 13:02:10,832 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 34 [2021-05-02 13:02:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:10,832 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-05-02 13:02:10,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 26 states have internal predecessors, (55), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-05-02 13:02:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 13:02:10,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:10,833 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:11,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 13:02:11,037 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash -200532835, now seen corresponding path program 12 times [2021-05-02 13:02:11,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:11,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133983146] [2021-05-02 13:02:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:11,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:11,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:11,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133983146] [2021-05-02 13:02:11,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133983146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:11,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892875314] [2021-05-02 13:02:11,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:11,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 13:02:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:02:11,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:11,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:11,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892875314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:11,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:11,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-02 13:02:11,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691626533] [2021-05-02 13:02:11,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 13:02:11,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:11,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 13:02:11,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:02:11,561 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:12,112 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 13:02:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:02:12,113 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 13:02:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:12,113 INFO L225 Difference]: With dead ends: 46 [2021-05-02 13:02:12,113 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 13:02:12,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=659, Invalid=1233, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 13:02:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 13:02:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 13:02:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-05-02 13:02:12,119 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 36 [2021-05-02 13:02:12,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:12,119 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-05-02 13:02:12,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-05-02 13:02:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:02:12,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:12,120 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:12,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 13:02:12,335 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:12,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:12,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1205326400, now seen corresponding path program 13 times [2021-05-02 13:02:12,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:12,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290117454] [2021-05-02 13:02:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:12,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:12,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:12,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290117454] [2021-05-02 13:02:12,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290117454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:12,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698155576] [2021-05-02 13:02:12,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:12,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:02:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:12,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:12,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698155576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:12,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:12,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-02 13:02:12,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11274450] [2021-05-02 13:02:12,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 13:02:12,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 13:02:12,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:02:12,909 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:13,497 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2021-05-02 13:02:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:02:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 13:02:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:13,498 INFO L225 Difference]: With dead ends: 48 [2021-05-02 13:02:13,498 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 13:02:13,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 746.2ms TimeCoverageRelationStatistics Valid=751, Invalid=1411, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 13:02:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 13:02:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 13:02:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-05-02 13:02:13,503 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 38 [2021-05-02 13:02:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:13,503 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-05-02 13:02:13,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 30 states have internal predecessors, (63), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-05-02 13:02:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 13:02:13,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:13,504 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:13,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 13:02:13,717 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash -678647005, now seen corresponding path program 14 times [2021-05-02 13:02:13,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:13,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41548309] [2021-05-02 13:02:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:13,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:13,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:13,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41548309] [2021-05-02 13:02:13,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41548309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:13,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576133938] [2021-05-02 13:02:13,922 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 [2021-05-02 13:02:13,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:13,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:02:13,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:13,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:13,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:14,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576133938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:14,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:14,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-02 13:02:14,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717857434] [2021-05-02 13:02:14,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:02:14,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:14,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:02:14,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:02:14,277 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:14,991 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2021-05-02 13:02:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:02:14,992 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 13:02:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:14,992 INFO L225 Difference]: With dead ends: 50 [2021-05-02 13:02:14,992 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 13:02:14,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=849, Invalid=1601, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 13:02:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 13:02:14,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 13:02:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-05-02 13:02:14,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 40 [2021-05-02 13:02:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:14,998 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-05-02 13:02:14,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-05-02 13:02:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:02:14,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:14,999 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:15,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:15,201 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1299109702, now seen corresponding path program 15 times [2021-05-02 13:02:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:15,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697753346] [2021-05-02 13:02:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:15,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:15,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697753346] [2021-05-02 13:02:15,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697753346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:15,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560573440] [2021-05-02 13:02:15,416 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 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 [2021-05-02 13:02:15,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 13:02:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:02:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:15,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:15,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560573440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:15,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:15,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-02 13:02:15,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769745229] [2021-05-02 13:02:15,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 13:02:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:15,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 13:02:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:02:15,811 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:16,547 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-02 13:02:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 13:02:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 13:02:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:16,548 INFO L225 Difference]: With dead ends: 52 [2021-05-02 13:02:16,548 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 13:02:16,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 884.0ms TimeCoverageRelationStatistics Valid=953, Invalid=1803, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 13:02:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 13:02:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 13:02:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2021-05-02 13:02:16,554 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 42 [2021-05-02 13:02:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:16,554 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2021-05-02 13:02:16,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2021-05-02 13:02:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:02:16,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:16,555 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:16,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:02:16,787 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash -747206999, now seen corresponding path program 16 times [2021-05-02 13:02:16,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:16,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511364862] [2021-05-02 13:02:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:17,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:17,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:17,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511364862] [2021-05-02 13:02:17,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511364862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:17,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763952934] [2021-05-02 13:02:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:17,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:17,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:17,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 13:02:17,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:17,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763952934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:17,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:17,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 41 [2021-05-02 13:02:17,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407186271] [2021-05-02 13:02:17,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 13:02:17,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:17,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 13:02:17,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 13:02:17,514 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 41 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:19,956 INFO L93 Difference]: Finished difference Result 86 states and 121 transitions. [2021-05-02 13:02:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:02:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-05-02 13:02:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:19,957 INFO L225 Difference]: With dead ends: 86 [2021-05-02 13:02:19,958 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 13:02:19,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 2205.5ms TimeCoverageRelationStatistics Valid=965, Invalid=4585, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 13:02:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 13:02:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 47. [2021-05-02 13:02:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 42 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-02 13:02:19,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 44 [2021-05-02 13:02:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:19,964 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-02 13:02:19,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:19,964 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-02 13:02:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 13:02:19,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:19,965 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:20,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:02:20,169 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:20,169 INFO L82 PathProgramCache]: Analyzing trace with hash -162535092, now seen corresponding path program 17 times [2021-05-02 13:02:20,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:20,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674676235] [2021-05-02 13:02:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:20,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:20,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:20,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674676235] [2021-05-02 13:02:20,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674676235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:20,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164454318] [2021-05-02 13:02:20,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:20,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 13:02:20,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:02:20,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:20,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:20,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164454318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:20,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:20,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-05-02 13:02:20,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779828091] [2021-05-02 13:02:20,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 13:02:20,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:20,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 13:02:20,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:02:20,898 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:21,690 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2021-05-02 13:02:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 13:02:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 13:02:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:21,691 INFO L225 Difference]: With dead ends: 56 [2021-05-02 13:02:21,691 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 13:02:21,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1010.8ms TimeCoverageRelationStatistics Valid=1179, Invalid=2243, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 13:02:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 13:02:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 13:02:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2021-05-02 13:02:21,696 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 46 [2021-05-02 13:02:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:21,696 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2021-05-02 13:02:21,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 38 states have internal predecessors, (79), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2021-05-02 13:02:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 13:02:21,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:21,696 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:21,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 13:02:21,900 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:21,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:21,901 INFO L82 PathProgramCache]: Analyzing trace with hash -933548241, now seen corresponding path program 18 times [2021-05-02 13:02:21,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:21,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553810651] [2021-05-02 13:02:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:22,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:22,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:22,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553810651] [2021-05-02 13:02:22,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553810651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:22,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941433473] [2021-05-02 13:02:22,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:22,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 13:02:22,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:02:22,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:22,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:22,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941433473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:22,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:22,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-02 13:02:22,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220615470] [2021-05-02 13:02:22,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 13:02:22,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:22,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 13:02:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:02:22,587 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:23,398 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2021-05-02 13:02:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:02:23,399 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 13:02:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:23,399 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:02:23,399 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 13:02:23,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1079.1ms TimeCoverageRelationStatistics Valid=1301, Invalid=2481, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 13:02:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 13:02:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 13:02:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-05-02 13:02:23,404 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 48 [2021-05-02 13:02:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:23,404 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-05-02 13:02:23,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 40 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-05-02 13:02:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 13:02:23,405 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:23,405 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:23,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:23,617 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1152157778, now seen corresponding path program 19 times [2021-05-02 13:02:23,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:23,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842004952] [2021-05-02 13:02:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:23,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:23,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842004952] [2021-05-02 13:02:23,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842004952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695964505] [2021-05-02 13:02:23,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:02:23,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:23,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:23,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:23,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:23,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:23,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:24,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695964505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:24,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:24,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-05-02 13:02:24,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757210896] [2021-05-02 13:02:24,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 13:02:24,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 13:02:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 13:02:24,384 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:25,278 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2021-05-02 13:02:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 13:02:25,278 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 13:02:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:25,279 INFO L225 Difference]: With dead ends: 60 [2021-05-02 13:02:25,279 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 13:02:25,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1186.7ms TimeCoverageRelationStatistics Valid=1429, Invalid=2731, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 13:02:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 13:02:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 13:02:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2021-05-02 13:02:25,285 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 50 [2021-05-02 13:02:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:25,285 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2021-05-02 13:02:25,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 42 states have internal predecessors, (87), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2021-05-02 13:02:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 13:02:25,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:25,286 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:25,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:25,487 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash -234085195, now seen corresponding path program 20 times [2021-05-02 13:02:25,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:25,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57239873] [2021-05-02 13:02:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:25,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:25,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:25,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57239873] [2021-05-02 13:02:25,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57239873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:25,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153220119] [2021-05-02 13:02:25,776 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 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 [2021-05-02 13:02:25,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:02:25,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:25,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:25,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:26,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153220119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:26,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:26,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-02 13:02:26,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401173683] [2021-05-02 13:02:26,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 13:02:26,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 13:02:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:02:26,297 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:27,168 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2021-05-02 13:02:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:02:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 13:02:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:27,169 INFO L225 Difference]: With dead ends: 62 [2021-05-02 13:02:27,169 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:02:27,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 1272.6ms TimeCoverageRelationStatistics Valid=1563, Invalid=2993, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 13:02:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:02:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 13:02:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2021-05-02 13:02:27,176 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 52 [2021-05-02 13:02:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:27,176 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2021-05-02 13:02:27,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 44 states have internal predecessors, (91), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2021-05-02 13:02:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 13:02:27,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:27,177 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:27,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:02:27,393 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash -973720488, now seen corresponding path program 21 times [2021-05-02 13:02:27,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:27,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752406655] [2021-05-02 13:02:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:27,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:27,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:27,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752406655] [2021-05-02 13:02:27,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752406655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:27,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773420769] [2021-05-02 13:02:27,696 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 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 [2021-05-02 13:02:27,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 13:02:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:27,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:02:27,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:27,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:28,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773420769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:28,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:28,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-05-02 13:02:28,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089580600] [2021-05-02 13:02:28,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 13:02:28,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:28,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 13:02:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 13:02:28,288 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:29,257 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2021-05-02 13:02:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:02:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 13:02:29,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:29,258 INFO L225 Difference]: With dead ends: 64 [2021-05-02 13:02:29,258 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 13:02:29,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1339.2ms TimeCoverageRelationStatistics Valid=1703, Invalid=3267, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 13:02:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 13:02:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 13:02:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2021-05-02 13:02:29,264 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 54 [2021-05-02 13:02:29,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:29,264 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2021-05-02 13:02:29,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2021-05-02 13:02:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 13:02:29,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:29,265 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:29,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 13:02:29,469 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1201334075, now seen corresponding path program 22 times [2021-05-02 13:02:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:29,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666224987] [2021-05-02 13:02:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:29,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:29,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:29,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666224987] [2021-05-02 13:02:29,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666224987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:29,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285484627] [2021-05-02 13:02:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:29,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:29,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 13:02:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:30,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285484627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:30,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:30,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 53 [2021-05-02 13:02:30,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127209837] [2021-05-02 13:02:30,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 13:02:30,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 13:02:30,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2397, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 13:02:30,496 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:34,252 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2021-05-02 13:02:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 13:02:34,253 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2021-05-02 13:02:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:34,253 INFO L225 Difference]: With dead ends: 110 [2021-05-02 13:02:34,253 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 13:02:34,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 3318.2ms TimeCoverageRelationStatistics Valid=1646, Invalid=8056, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 13:02:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 13:02:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2021-05-02 13:02:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2021-05-02 13:02:34,259 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 56 [2021-05-02 13:02:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:34,260 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-05-02 13:02:34,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:34,260 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2021-05-02 13:02:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 13:02:34,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:34,261 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:34,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:34,465 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash -220304034, now seen corresponding path program 23 times [2021-05-02 13:02:34,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:34,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678967370] [2021-05-02 13:02:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:34,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:34,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:34,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678967370] [2021-05-02 13:02:34,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678967370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:34,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264423483] [2021-05-02 13:02:34,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:34,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 13:02:34,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:02:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:34,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:34,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:35,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264423483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:35,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:35,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-05-02 13:02:35,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358938341] [2021-05-02 13:02:35,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 13:02:35,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 13:02:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:02:35,505 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:36,605 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-02 13:02:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 13:02:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 13:02:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:36,606 INFO L225 Difference]: With dead ends: 68 [2021-05-02 13:02:36,606 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 13:02:36,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1575.4ms TimeCoverageRelationStatistics Valid=2001, Invalid=3851, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 13:02:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 13:02:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 13:02:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2021-05-02 13:02:36,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 58 [2021-05-02 13:02:36,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:36,611 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2021-05-02 13:02:36,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 50 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2021-05-02 13:02:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 13:02:36,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:36,612 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:36,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:02:36,815 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash -614926655, now seen corresponding path program 24 times [2021-05-02 13:02:36,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:36,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568207987] [2021-05-02 13:02:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:37,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:37,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:37,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568207987] [2021-05-02 13:02:37,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568207987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:37,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019274505] [2021-05-02 13:02:37,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:37,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 13:02:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:02:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:37,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:37,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019274505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:37,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:37,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-05-02 13:02:37,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400973979] [2021-05-02 13:02:37,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 13:02:37,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:37,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 13:02:37,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:02:37,908 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:39,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:39,031 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2021-05-02 13:02:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:02:39,032 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 13:02:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:39,032 INFO L225 Difference]: With dead ends: 70 [2021-05-02 13:02:39,032 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 13:02:39,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1629.1ms TimeCoverageRelationStatistics Valid=2159, Invalid=4161, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 13:02:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 13:02:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 13:02:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2021-05-02 13:02:39,038 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 60 [2021-05-02 13:02:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:39,038 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2021-05-02 13:02:39,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 52 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2021-05-02 13:02:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 13:02:39,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:39,039 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:39,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:39,253 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1890143388, now seen corresponding path program 25 times [2021-05-02 13:02:39,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:39,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732116007] [2021-05-02 13:02:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:39,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:39,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732116007] [2021-05-02 13:02:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732116007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208001314] [2021-05-02 13:02:39,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 13:02:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:02:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:39,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:39,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:40,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208001314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:40,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:40,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-05-02 13:02:40,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98051799] [2021-05-02 13:02:40,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 13:02:40,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:40,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 13:02:40,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 13:02:40,414 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:41,591 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2021-05-02 13:02:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 13:02:41,592 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 13:02:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:41,592 INFO L225 Difference]: With dead ends: 72 [2021-05-02 13:02:41,592 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 13:02:41,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=2323, Invalid=4483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 13:02:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 13:02:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 13:02:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.45) internal successors, (87), 60 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2021-05-02 13:02:41,599 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 62 [2021-05-02 13:02:41,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:41,600 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2021-05-02 13:02:41,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 54 states have internal predecessors, (111), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2021-05-02 13:02:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 13:02:41,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:41,600 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:41,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 13:02:41,809 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash 987222855, now seen corresponding path program 26 times [2021-05-02 13:02:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:41,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166655370] [2021-05-02 13:02:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:42,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:42,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:42,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166655370] [2021-05-02 13:02:42,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166655370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:42,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093683822] [2021-05-02 13:02:42,325 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 [2021-05-02 13:02:42,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:02:42,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:02:42,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:42,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:43,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:43,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093683822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:43,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:43,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-05-02 13:02:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875685985] [2021-05-02 13:02:43,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 13:02:43,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:43,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 13:02:43,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:02:43,029 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:44,300 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2021-05-02 13:02:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 13:02:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 13:02:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:44,301 INFO L225 Difference]: With dead ends: 74 [2021-05-02 13:02:44,301 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 13:02:44,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 1922.2ms TimeCoverageRelationStatistics Valid=2493, Invalid=4817, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 13:02:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 13:02:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 13:02:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:44,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2021-05-02 13:02:44,307 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 64 [2021-05-02 13:02:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:44,308 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2021-05-02 13:02:44,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 56 states have internal predecessors, (115), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2021-05-02 13:02:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 13:02:44,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:44,308 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:44,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 13:02:44,525 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:44,525 INFO L82 PathProgramCache]: Analyzing trace with hash 177243754, now seen corresponding path program 27 times [2021-05-02 13:02:44,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:44,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611339915] [2021-05-02 13:02:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:44,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:44,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611339915] [2021-05-02 13:02:44,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611339915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:44,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985793024] [2021-05-02 13:02:44,978 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:45,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 13:02:45,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:02:45,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:45,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:45,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985793024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:45,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:45,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-05-02 13:02:45,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926522040] [2021-05-02 13:02:45,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 13:02:45,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:45,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 13:02:45,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 13:02:45,739 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:47,034 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2021-05-02 13:02:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 13:02:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 13:02:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:47,034 INFO L225 Difference]: With dead ends: 76 [2021-05-02 13:02:47,035 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 13:02:47,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 1889.1ms TimeCoverageRelationStatistics Valid=2669, Invalid=5163, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 13:02:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 13:02:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 13:02:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.453125) internal successors, (93), 64 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2021-05-02 13:02:47,039 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 66 [2021-05-02 13:02:47,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:47,039 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2021-05-02 13:02:47,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 58 states have internal predecessors, (119), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:47,039 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2021-05-02 13:02:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 13:02:47,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:47,040 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:47,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 13:02:47,241 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash -823591731, now seen corresponding path program 28 times [2021-05-02 13:02:47,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:47,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834621661] [2021-05-02 13:02:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:47,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:47,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:47,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834621661] [2021-05-02 13:02:47,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834621661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:47,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387337073] [2021-05-02 13:02:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:47,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:02:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 13:02:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:48,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387337073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:48,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:48,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34] total 65 [2021-05-02 13:02:48,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892728107] [2021-05-02 13:02:48,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 13:02:48,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:48,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 13:02:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=3624, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 13:02:48,764 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 65 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:54,181 INFO L93 Difference]: Finished difference Result 134 states and 193 transitions. [2021-05-02 13:02:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 13:02:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 68 [2021-05-02 13:02:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:54,182 INFO L225 Difference]: With dead ends: 134 [2021-05-02 13:02:54,182 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 13:02:54,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2670 ImplicationChecksByTransitivity, 4877.1ms TimeCoverageRelationStatistics Valid=2507, Invalid=12499, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 13:02:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 13:02:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 71. [2021-05-02 13:02:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2021-05-02 13:02:54,190 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 68 [2021-05-02 13:02:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:54,190 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2021-05-02 13:02:54,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:02:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2021-05-02 13:02:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 13:02:54,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:54,191 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:54,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 13:02:54,405 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:54,405 INFO L82 PathProgramCache]: Analyzing trace with hash -553818512, now seen corresponding path program 29 times [2021-05-02 13:02:54,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:54,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201639029] [2021-05-02 13:02:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:54,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:54,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:54,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201639029] [2021-05-02 13:02:54,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201639029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:54,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044585455] [2021-05-02 13:02:54,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:54,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 13:02:54,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:02:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:55,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:55,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044585455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:55,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:55,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-05-02 13:02:55,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055663224] [2021-05-02 13:02:55,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 13:02:55,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:55,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 13:02:55,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:02:55,729 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:02:57,154 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2021-05-02 13:02:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 13:02:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 13:02:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:02:57,155 INFO L225 Difference]: With dead ends: 80 [2021-05-02 13:02:57,155 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 13:02:57,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 2144.4ms TimeCoverageRelationStatistics Valid=3039, Invalid=5891, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 13:02:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 13:02:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 13:02:57,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 68 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2021-05-02 13:02:57,162 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 70 [2021-05-02 13:02:57,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:02:57,162 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2021-05-02 13:02:57,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 62 states have internal predecessors, (127), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:02:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2021-05-02 13:02:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 13:02:57,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:02:57,163 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:02:57,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:57,373 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:02:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:02:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1000207187, now seen corresponding path program 30 times [2021-05-02 13:02:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:02:57,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324083430] [2021-05-02 13:02:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:02:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:02:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:02:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:58,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:02:58,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324083430] [2021-05-02 13:02:58,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324083430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:58,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191629700] [2021-05-02 13:02:58,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:02:58,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 13:02:58,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:02:58,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:02:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:02:58,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:02:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:02:58,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191629700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:02:58,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:02:58,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-05-02 13:02:58,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481424182] [2021-05-02 13:02:58,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 13:02:58,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:02:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 13:02:58,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 13:02:58,851 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:00,434 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2021-05-02 13:03:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 13:03:00,435 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 13:03:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:00,435 INFO L225 Difference]: With dead ends: 82 [2021-05-02 13:03:00,435 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 13:03:00,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 2352.8ms TimeCoverageRelationStatistics Valid=3233, Invalid=6273, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 13:03:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 13:03:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 13:03:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.457142857142857) internal successors, (102), 70 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2021-05-02 13:03:00,444 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 72 [2021-05-02 13:03:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:00,444 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2021-05-02 13:03:00,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 64 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2021-05-02 13:03:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 13:03:00,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:00,445 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:00,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:00,653 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash -229715082, now seen corresponding path program 31 times [2021-05-02 13:03:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921373769] [2021-05-02 13:03:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:01,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:01,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921373769] [2021-05-02 13:03:01,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921373769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:01,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109415515] [2021-05-02 13:03:01,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:03:01,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:01,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:01,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:02,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:02,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:02,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:02,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:02,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:02,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109415515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:02,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:02,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2021-05-02 13:03:02,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753289971] [2021-05-02 13:03:02,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 13:03:02,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 13:03:02,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 13:03:02,112 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:03,655 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2021-05-02 13:03:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 13:03:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 13:03:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:03,656 INFO L225 Difference]: With dead ends: 84 [2021-05-02 13:03:03,656 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 13:03:03,656 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 2342.7ms TimeCoverageRelationStatistics Valid=3433, Invalid=6667, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 13:03:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 13:03:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 13:03:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 72 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2021-05-02 13:03:03,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 74 [2021-05-02 13:03:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:03,662 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2021-05-02 13:03:03,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 66 states have internal predecessors, (135), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:03,662 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2021-05-02 13:03:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 13:03:03,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:03,662 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:03,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:03,863 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1069009191, now seen corresponding path program 32 times [2021-05-02 13:03:03,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:03,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881291850] [2021-05-02 13:03:03,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:04,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:04,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881291850] [2021-05-02 13:03:04,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881291850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8159694] [2021-05-02 13:03:04,458 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:04,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:03:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:04,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:03:04,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:04,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:05,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8159694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:05,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:05,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-05-02 13:03:05,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95152674] [2021-05-02 13:03:05,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 13:03:05,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:05,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 13:03:05,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:03:05,384 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:07,069 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2021-05-02 13:03:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:03:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 13:03:07,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:07,070 INFO L225 Difference]: With dead ends: 86 [2021-05-02 13:03:07,070 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 13:03:07,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 2460.3ms TimeCoverageRelationStatistics Valid=3639, Invalid=7073, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 13:03:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 13:03:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 13:03:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2021-05-02 13:03:07,078 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 76 [2021-05-02 13:03:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:07,078 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2021-05-02 13:03:07,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 68 states have internal predecessors, (139), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2021-05-02 13:03:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 13:03:07,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:07,079 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:07,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 13:03:07,285 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:07,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:07,285 INFO L82 PathProgramCache]: Analyzing trace with hash -176796292, now seen corresponding path program 33 times [2021-05-02 13:03:07,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:07,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759399950] [2021-05-02 13:03:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:07,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:07,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:07,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759399950] [2021-05-02 13:03:07,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759399950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:07,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009093624] [2021-05-02 13:03:07,949 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:08,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 13:03:08,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:08,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:03:08,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:08,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:08,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009093624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:08,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:08,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2021-05-02 13:03:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577788997] [2021-05-02 13:03:08,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 13:03:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:08,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 13:03:08,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 13:03:08,909 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:10,632 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2021-05-02 13:03:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 13:03:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 13:03:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:10,634 INFO L225 Difference]: With dead ends: 88 [2021-05-02 13:03:10,634 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 13:03:10,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3430 ImplicationChecksByTransitivity, 2598.4ms TimeCoverageRelationStatistics Valid=3851, Invalid=7491, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 13:03:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 13:03:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 13:03:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2021-05-02 13:03:10,642 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 78 [2021-05-02 13:03:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:10,642 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2021-05-02 13:03:10,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 70 states have internal predecessors, (143), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2021-05-02 13:03:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 13:03:10,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:10,643 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:10,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:10,849 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1753659553, now seen corresponding path program 34 times [2021-05-02 13:03:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:10,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786620605] [2021-05-02 13:03:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:11,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:11,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:11,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786620605] [2021-05-02 13:03:11,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786620605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:11,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975436220] [2021-05-02 13:03:11,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:11,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:03:11,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 13:03:11,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:12,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975436220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:12,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:12,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40] total 77 [2021-05-02 13:03:12,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770778972] [2021-05-02 13:03:12,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 13:03:12,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:12,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 13:03:12,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=5103, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 13:03:12,868 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:03:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:20,279 INFO L93 Difference]: Finished difference Result 158 states and 229 transitions. [2021-05-02 13:03:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 13:03:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 80 [2021-05-02 13:03:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:20,280 INFO L225 Difference]: With dead ends: 158 [2021-05-02 13:03:20,280 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 13:03:20,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 6521.7ms TimeCoverageRelationStatistics Valid=3548, Invalid=17914, Unknown=0, NotChecked=0, Total=21462 [2021-05-02 13:03:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 13:03:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2021-05-02 13:03:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 78 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:20,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2021-05-02 13:03:20,287 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 80 [2021-05-02 13:03:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:20,287 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2021-05-02 13:03:20,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:03:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2021-05-02 13:03:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 13:03:20,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:20,288 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:20,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 13:03:20,489 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash -995797886, now seen corresponding path program 35 times [2021-05-02 13:03:20,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:20,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522294597] [2021-05-02 13:03:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:21,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:21,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:21,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522294597] [2021-05-02 13:03:21,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522294597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:21,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147335117] [2021-05-02 13:03:21,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:21,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 13:03:21,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:21,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 13:03:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:21,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:21,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:22,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147335117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:22,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:22,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2021-05-02 13:03:22,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456556475] [2021-05-02 13:03:22,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 13:03:22,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 13:03:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:03:22,279 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:24,140 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2021-05-02 13:03:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 13:03:24,140 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 13:03:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:24,141 INFO L225 Difference]: With dead ends: 92 [2021-05-02 13:03:24,141 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:03:24,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3848 ImplicationChecksByTransitivity, 2861.5ms TimeCoverageRelationStatistics Valid=4293, Invalid=8363, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 13:03:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:03:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 13:03:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.4625) internal successors, (117), 80 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2021-05-02 13:03:24,150 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 82 [2021-05-02 13:03:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:24,150 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2021-05-02 13:03:24,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 74 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2021-05-02 13:03:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 13:03:24,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:24,151 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:24,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:24,365 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:24,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:24,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1459791077, now seen corresponding path program 36 times [2021-05-02 13:03:24,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:24,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076331126] [2021-05-02 13:03:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:25,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:25,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076331126] [2021-05-02 13:03:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076331126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085564344] [2021-05-02 13:03:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:25,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 13:03:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:25,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:03:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:25,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:25,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:26,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085564344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:26,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:26,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-05-02 13:03:26,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794689039] [2021-05-02 13:03:26,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 13:03:26,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 13:03:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 13:03:26,487 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:28,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:28,398 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2021-05-02 13:03:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:03:28,398 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 13:03:28,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:28,399 INFO L225 Difference]: With dead ends: 94 [2021-05-02 13:03:28,399 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 13:03:28,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 3261.7ms TimeCoverageRelationStatistics Valid=4523, Invalid=8817, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 13:03:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 13:03:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 13:03:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2021-05-02 13:03:28,407 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 84 [2021-05-02 13:03:28,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:28,408 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2021-05-02 13:03:28,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 76 states have internal predecessors, (155), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2021-05-02 13:03:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 13:03:28,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:28,408 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:28,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 13:03:28,632 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash -951228280, now seen corresponding path program 37 times [2021-05-02 13:03:28,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:28,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563685084] [2021-05-02 13:03:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:29,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:29,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:29,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563685084] [2021-05-02 13:03:29,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563685084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:29,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452871673] [2021-05-02 13:03:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 13:03:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:29,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:29,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:30,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452871673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:30,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:30,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2021-05-02 13:03:30,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287676475] [2021-05-02 13:03:30,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 13:03:30,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:30,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 13:03:30,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 13:03:30,528 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:32,550 INFO L93 Difference]: Finished difference Result 96 states and 135 transitions. [2021-05-02 13:03:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 13:03:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 13:03:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:32,551 INFO L225 Difference]: With dead ends: 96 [2021-05-02 13:03:32,551 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 13:03:32,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4290 ImplicationChecksByTransitivity, 3157.6ms TimeCoverageRelationStatistics Valid=4759, Invalid=9283, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 13:03:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 13:03:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 13:03:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2021-05-02 13:03:32,557 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 86 [2021-05-02 13:03:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:32,557 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2021-05-02 13:03:32,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 78 states have internal predecessors, (159), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2021-05-02 13:03:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 13:03:32,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:32,558 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:32,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 13:03:32,759 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1341509483, now seen corresponding path program 38 times [2021-05-02 13:03:32,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:32,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542709158] [2021-05-02 13:03:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:33,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:33,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542709158] [2021-05-02 13:03:33,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542709158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:33,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998007724] [2021-05-02 13:03:33,572 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:33,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:03:33,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:03:33,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:33,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:34,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998007724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:34,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:34,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-05-02 13:03:34,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057886963] [2021-05-02 13:03:34,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 13:03:34,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 13:03:34,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:03:34,810 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:36,932 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2021-05-02 13:03:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 13:03:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 13:03:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:36,933 INFO L225 Difference]: With dead ends: 98 [2021-05-02 13:03:36,933 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 13:03:36,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4520 ImplicationChecksByTransitivity, 3343.8ms TimeCoverageRelationStatistics Valid=5001, Invalid=9761, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 13:03:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 13:03:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 13:03:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2021-05-02 13:03:36,940 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 88 [2021-05-02 13:03:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:36,940 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2021-05-02 13:03:36,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 80 states have internal predecessors, (163), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2021-05-02 13:03:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 13:03:36,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:36,941 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:37,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 13:03:37,163 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:37,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:37,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1344276878, now seen corresponding path program 39 times [2021-05-02 13:03:37,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:37,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131466569] [2021-05-02 13:03:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:37,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:37,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:37,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131466569] [2021-05-02 13:03:37,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131466569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:37,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683257892] [2021-05-02 13:03:37,987 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:38,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 13:03:38,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 13:03:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:38,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:38,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:39,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683257892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:39,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:39,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2021-05-02 13:03:39,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689321313] [2021-05-02 13:03:39,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 13:03:39,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 13:03:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 13:03:39,201 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:41,378 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2021-05-02 13:03:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 13:03:41,378 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 13:03:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:41,379 INFO L225 Difference]: With dead ends: 100 [2021-05-02 13:03:41,379 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 13:03:41,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 3368.3ms TimeCoverageRelationStatistics Valid=5249, Invalid=10251, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 13:03:41,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 13:03:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 13:03:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.4659090909090908) internal successors, (129), 88 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2021-05-02 13:03:41,387 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 90 [2021-05-02 13:03:41,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:41,387 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2021-05-02 13:03:41,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 82 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:41,387 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2021-05-02 13:03:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 13:03:41,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:41,387 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:41,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 13:03:41,588 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:41,588 INFO L82 PathProgramCache]: Analyzing trace with hash -291223823, now seen corresponding path program 40 times [2021-05-02 13:03:41,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:41,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709778774] [2021-05-02 13:03:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:42,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:42,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:42,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709778774] [2021-05-02 13:03:42,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709778774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:42,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802571859] [2021-05-02 13:03:42,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:42,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:03:42,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 90 conjunts are in the unsatisfiable core [2021-05-02 13:03:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:44,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802571859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:44,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:44,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 46] total 89 [2021-05-02 13:03:44,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228509937] [2021-05-02 13:03:44,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 13:03:44,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 13:03:44,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=6834, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 13:03:44,251 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand has 89 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:03:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:53,773 INFO L93 Difference]: Finished difference Result 182 states and 265 transitions. [2021-05-02 13:03:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 13:03:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 92 [2021-05-02 13:03:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:53,775 INFO L225 Difference]: With dead ends: 182 [2021-05-02 13:03:53,775 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 13:03:53,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5250 ImplicationChecksByTransitivity, 8783.5ms TimeCoverageRelationStatistics Valid=4769, Invalid=24301, Unknown=0, NotChecked=0, Total=29070 [2021-05-02 13:03:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 13:03:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 95. [2021-05-02 13:03:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.4666666666666666) internal successors, (132), 90 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2021-05-02 13:03:53,791 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 92 [2021-05-02 13:03:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:53,791 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2021-05-02 13:03:53,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:03:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2021-05-02 13:03:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 13:03:53,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:53,792 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:54,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:54,002 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:54,002 INFO L82 PathProgramCache]: Analyzing trace with hash -49367148, now seen corresponding path program 41 times [2021-05-02 13:03:54,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:54,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322099009] [2021-05-02 13:03:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:54,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:54,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322099009] [2021-05-02 13:03:54,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322099009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080520791] [2021-05-02 13:03:54,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:03:55,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 13:03:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:03:55,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 13:03:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:03:55,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:55,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:03:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:56,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080520791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:56,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:03:56,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2021-05-02 13:03:56,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053528123] [2021-05-02 13:03:56,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 13:03:56,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:03:56,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 13:03:56,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:03:56,260 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:03:58,629 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2021-05-02 13:03:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 13:03:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 13:03:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:03:58,630 INFO L225 Difference]: With dead ends: 104 [2021-05-02 13:03:58,630 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 13:03:58,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5246 ImplicationChecksByTransitivity, 3751.3ms TimeCoverageRelationStatistics Valid=5763, Invalid=11267, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 13:03:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 13:03:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 13:03:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 92 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2021-05-02 13:03:58,650 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 94 [2021-05-02 13:03:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:03:58,650 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2021-05-02 13:03:58,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 86 states have internal predecessors, (175), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:03:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2021-05-02 13:03:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 13:03:58,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:03:58,651 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:03:58,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-02 13:03:58,873 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:03:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:03:58,873 INFO L82 PathProgramCache]: Analyzing trace with hash 446663543, now seen corresponding path program 42 times [2021-05-02 13:03:58,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:03:58,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52944263] [2021-05-02 13:03:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:03:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:59,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:03:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:03:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:03:59,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:03:59,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52944263] [2021-05-02 13:03:59,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52944263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:03:59,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588966956] [2021-05-02 13:03:59,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:00,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 13:04:00,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:04:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:00,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:00,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:01,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588966956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:01,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:01,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2021-05-02 13:04:01,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623584085] [2021-05-02 13:04:01,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 13:04:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 13:04:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 13:04:01,338 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:03,950 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2021-05-02 13:04:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 13:04:03,950 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 13:04:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:03,951 INFO L225 Difference]: With dead ends: 106 [2021-05-02 13:04:03,951 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 13:04:03,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 4129.7ms TimeCoverageRelationStatistics Valid=6029, Invalid=11793, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 13:04:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 13:04:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 13:04:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 94 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2021-05-02 13:04:03,962 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 96 [2021-05-02 13:04:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:03,963 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2021-05-02 13:04:03,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 88 states have internal predecessors, (179), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2021-05-02 13:04:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 13:04:03,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:03,963 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:04,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:04,181 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash 390787738, now seen corresponding path program 43 times [2021-05-02 13:04:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:04,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73726133] [2021-05-02 13:04:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:05,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:05,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:05,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73726133] [2021-05-02 13:04:05,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73726133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:05,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756302191] [2021-05-02 13:04:05,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 13:04:05,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:05,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:05,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:06,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756302191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:06,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:06,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2021-05-02 13:04:06,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031779879] [2021-05-02 13:04:06,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 13:04:06,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 13:04:06,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 13:04:06,642 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:09,225 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2021-05-02 13:04:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 13:04:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 13:04:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:09,226 INFO L225 Difference]: With dead ends: 108 [2021-05-02 13:04:09,226 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 13:04:09,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5760 ImplicationChecksByTransitivity, 4138.8ms TimeCoverageRelationStatistics Valid=6301, Invalid=12331, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 13:04:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 13:04:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 13:04:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2021-05-02 13:04:09,233 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 98 [2021-05-02 13:04:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:09,233 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2021-05-02 13:04:09,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 90 states have internal predecessors, (183), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2021-05-02 13:04:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 13:04:09,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:09,234 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:09,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:09,458 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1766253315, now seen corresponding path program 44 times [2021-05-02 13:04:09,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:09,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913433300] [2021-05-02 13:04:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:10,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:10,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:10,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913433300] [2021-05-02 13:04:10,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913433300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:10,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038836488] [2021-05-02 13:04:10,532 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:10,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:04:10,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 13:04:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:10,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:10,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:11,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:12,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038836488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:12,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:12,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2021-05-02 13:04:12,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63417778] [2021-05-02 13:04:12,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 13:04:12,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 13:04:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:04:12,036 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:14,782 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2021-05-02 13:04:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 13:04:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 13:04:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:14,785 INFO L225 Difference]: With dead ends: 110 [2021-05-02 13:04:14,785 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 13:04:14,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6026 ImplicationChecksByTransitivity, 4345.9ms TimeCoverageRelationStatistics Valid=6579, Invalid=12881, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 13:04:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 13:04:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 13:04:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.469387755102041) internal successors, (144), 98 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2021-05-02 13:04:14,796 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 100 [2021-05-02 13:04:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:14,796 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2021-05-02 13:04:14,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 92 states have internal predecessors, (187), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2021-05-02 13:04:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 13:04:14,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:14,797 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:15,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 13:04:15,020 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash -213501280, now seen corresponding path program 45 times [2021-05-02 13:04:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:15,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009798792] [2021-05-02 13:04:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:16,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:16,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009798792] [2021-05-02 13:04:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009798792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267534243] [2021-05-02 13:04:16,187 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:16,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 13:04:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:16,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 13:04:16,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:16,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:16,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:17,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267534243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:17,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:17,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2021-05-02 13:04:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807680214] [2021-05-02 13:04:17,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 13:04:17,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 13:04:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 13:04:17,793 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:20,754 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2021-05-02 13:04:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 13:04:20,755 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 13:04:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:20,755 INFO L225 Difference]: With dead ends: 112 [2021-05-02 13:04:20,755 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 13:04:20,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6298 ImplicationChecksByTransitivity, 4654.0ms TimeCoverageRelationStatistics Valid=6863, Invalid=13443, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 13:04:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 13:04:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 13:04:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.47) internal successors, (147), 100 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2021-05-02 13:04:20,766 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 102 [2021-05-02 13:04:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:20,766 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2021-05-02 13:04:20,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 94 states have internal predecessors, (191), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2021-05-02 13:04:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 13:04:20,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:20,767 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:20,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 13:04:20,990 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1627552643, now seen corresponding path program 46 times [2021-05-02 13:04:20,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:20,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925611210] [2021-05-02 13:04:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:22,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:22,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:22,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925611210] [2021-05-02 13:04:22,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925611210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:22,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650394577] [2021-05-02 13:04:22,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:22,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:04:22,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:22,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-02 13:04:22,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650394577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:24,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:24,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 52] total 101 [2021-05-02 13:04:24,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440113127] [2021-05-02 13:04:24,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 13:04:24,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:24,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 13:04:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=8817, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 13:04:24,542 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand has 101 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:04:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:37,812 INFO L93 Difference]: Finished difference Result 206 states and 301 transitions. [2021-05-02 13:04:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 13:04:37,813 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2021-05-02 13:04:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:37,814 INFO L225 Difference]: With dead ends: 206 [2021-05-02 13:04:37,814 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 13:04:37,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 11563.3ms TimeCoverageRelationStatistics Valid=6170, Invalid=31660, Unknown=0, NotChecked=0, Total=37830 [2021-05-02 13:04:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 13:04:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 107. [2021-05-02 13:04:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4705882352941178) internal successors, (150), 102 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2021-05-02 13:04:37,838 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 104 [2021-05-02 13:04:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:37,838 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2021-05-02 13:04:37,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:04:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2021-05-02 13:04:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 13:04:37,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:37,839 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:38,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 13:04:38,061 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1353846694, now seen corresponding path program 47 times [2021-05-02 13:04:38,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:38,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047356136] [2021-05-02 13:04:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:39,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:39,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:39,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047356136] [2021-05-02 13:04:39,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047356136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:39,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441432863] [2021-05-02 13:04:39,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:39,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 13:04:39,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:39,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 13:04:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:39,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:39,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:41,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:41,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:41,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:41,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:41,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:41,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441432863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:41,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:41,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2021-05-02 13:04:41,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802473805] [2021-05-02 13:04:41,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 13:04:41,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 13:04:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:04:41,158 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:44,299 INFO L93 Difference]: Finished difference Result 116 states and 165 transitions. [2021-05-02 13:04:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 13:04:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 13:04:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:44,301 INFO L225 Difference]: With dead ends: 116 [2021-05-02 13:04:44,301 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 13:04:44,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6860 ImplicationChecksByTransitivity, 5143.0ms TimeCoverageRelationStatistics Valid=7449, Invalid=14603, Unknown=0, NotChecked=0, Total=22052 [2021-05-02 13:04:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 13:04:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 13:04:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2021-05-02 13:04:44,313 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 106 [2021-05-02 13:04:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:44,313 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2021-05-02 13:04:44,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 98 states have internal predecessors, (199), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2021-05-02 13:04:44,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 13:04:44,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:44,314 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:44,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:44,514 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:44,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:44,515 INFO L82 PathProgramCache]: Analyzing trace with hash 315434761, now seen corresponding path program 48 times [2021-05-02 13:04:44,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:44,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899722971] [2021-05-02 13:04:44,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:45,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:45,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:45,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899722971] [2021-05-02 13:04:45,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899722971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:45,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571114399] [2021-05-02 13:04:45,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:45,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 13:04:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 13:04:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:45,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:45,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:45,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:45,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:45,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:47,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571114399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:47,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:47,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2021-05-02 13:04:47,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134028303] [2021-05-02 13:04:47,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 13:04:47,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:47,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 13:04:47,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 13:04:47,704 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:51,108 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2021-05-02 13:04:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:04:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 13:04:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:51,119 INFO L225 Difference]: With dead ends: 118 [2021-05-02 13:04:51,119 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 13:04:51,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7150 ImplicationChecksByTransitivity, 5427.1ms TimeCoverageRelationStatistics Valid=7751, Invalid=15201, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 13:04:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 13:04:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 13:04:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.471698113207547) internal successors, (156), 106 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2021-05-02 13:04:51,132 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 108 [2021-05-02 13:04:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:51,132 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2021-05-02 13:04:51,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 100 states have internal predecessors, (203), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2021-05-02 13:04:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 13:04:51,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:51,133 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:51,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 13:04:51,357 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1166020180, now seen corresponding path program 49 times [2021-05-02 13:04:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:51,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648585382] [2021-05-02 13:04:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:52,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:52,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:52,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648585382] [2021-05-02 13:04:52,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648585382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:52,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291529641] [2021-05-02 13:04:52,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:52,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 13:04:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:52,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:52,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:53,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:54,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291529641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:54,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:04:54,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2021-05-02 13:04:54,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960209415] [2021-05-02 13:04:54,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 13:04:54,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:04:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 13:04:54,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4030, Invalid=6682, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 13:04:54,731 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:04:58,181 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2021-05-02 13:04:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 13:04:58,182 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 13:04:58,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:04:58,182 INFO L225 Difference]: With dead ends: 120 [2021-05-02 13:04:58,182 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 13:04:58,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7446 ImplicationChecksByTransitivity, 5726.1ms TimeCoverageRelationStatistics Valid=8059, Invalid=15811, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 13:04:58,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 13:04:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 13:04:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4722222222222223) internal successors, (159), 108 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2021-05-02 13:04:58,195 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 110 [2021-05-02 13:04:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:04:58,195 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2021-05-02 13:04:58,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 102 states have internal predecessors, (207), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:04:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2021-05-02 13:04:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 13:04:58,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:04:58,196 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:04:58,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 13:04:58,396 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:04:58,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:04:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1084923791, now seen corresponding path program 50 times [2021-05-02 13:04:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:04:58,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426666308] [2021-05-02 13:04:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:04:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:59,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:04:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:04:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:04:59,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:04:59,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426666308] [2021-05-02 13:04:59,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426666308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:04:59,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363670686] [2021-05-02 13:04:59,810 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:04:59,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:04:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:04:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 13:04:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:04:59,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:04:59,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:00,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:01,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363670686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:01,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:05:01,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 106 [2021-05-02 13:05:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305199903] [2021-05-02 13:05:01,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 13:05:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:05:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 13:05:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4187, Invalid=6943, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:05:01,858 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:05:05,582 INFO L93 Difference]: Finished difference Result 122 states and 174 transitions. [2021-05-02 13:05:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 13:05:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 13:05:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:05:05,584 INFO L225 Difference]: With dead ends: 122 [2021-05-02 13:05:05,584 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 13:05:05,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 5980.5ms TimeCoverageRelationStatistics Valid=8373, Invalid=16433, Unknown=0, NotChecked=0, Total=24806 [2021-05-02 13:05:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 13:05:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 13:05:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 110 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2021-05-02 13:05:05,594 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 112 [2021-05-02 13:05:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:05:05,594 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2021-05-02 13:05:05,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 104 states have internal predecessors, (211), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2021-05-02 13:05:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 13:05:05,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:05:05,595 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:05:05,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:05,797 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:05:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:05:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash -421437262, now seen corresponding path program 51 times [2021-05-02 13:05:05,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:05:05,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033504852] [2021-05-02 13:05:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:05:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:07,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:05:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:07,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:05:07,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033504852] [2021-05-02 13:05:07,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033504852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:07,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018635799] [2021-05-02 13:05:07,403 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:07,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 13:05:07,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:05:07,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 13:05:07,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:05:07,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:07,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:09,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018635799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:09,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:05:09,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 108 [2021-05-02 13:05:09,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44419124] [2021-05-02 13:05:09,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 13:05:09,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:05:09,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 13:05:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4347, Invalid=7209, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 13:05:09,701 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:13,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:05:13,689 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2021-05-02 13:05:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 13:05:13,690 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 13:05:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:05:13,691 INFO L225 Difference]: With dead ends: 124 [2021-05-02 13:05:13,691 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 13:05:13,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8056 ImplicationChecksByTransitivity, 6620.7ms TimeCoverageRelationStatistics Valid=8693, Invalid=17067, Unknown=0, NotChecked=0, Total=25760 [2021-05-02 13:05:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 13:05:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 13:05:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2021-05-02 13:05:13,702 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 114 [2021-05-02 13:05:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:05:13,703 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2021-05-02 13:05:13,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 106 states have internal predecessors, (215), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2021-05-02 13:05:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 13:05:13,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:05:13,703 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:05:13,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 13:05:13,905 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:05:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:05:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash -630430443, now seen corresponding path program 52 times [2021-05-02 13:05:13,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:05:13,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197921841] [2021-05-02 13:05:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:05:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:15,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:05:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:15,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:05:15,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197921841] [2021-05-02 13:05:15,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197921841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:15,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763028897] [2021-05-02 13:05:15,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:15,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:05:15,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:05:15,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 114 conjunts are in the unsatisfiable core [2021-05-02 13:05:15,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:05:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:19,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763028897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:19,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:05:19,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 58] total 113 [2021-05-02 13:05:19,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543215802] [2021-05-02 13:05:19,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 13:05:19,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:05:19,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 13:05:19,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=11052, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 13:05:19,112 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 states have internal predecessors, (223), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:05:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:05:38,779 INFO L93 Difference]: Finished difference Result 230 states and 337 transitions. [2021-05-02 13:05:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 13:05:38,780 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 states have internal predecessors, (223), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2021-05-02 13:05:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:05:38,781 INFO L225 Difference]: With dead ends: 230 [2021-05-02 13:05:38,781 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 13:05:38,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8694 ImplicationChecksByTransitivity, 16682.9ms TimeCoverageRelationStatistics Valid=7751, Invalid=39991, Unknown=0, NotChecked=0, Total=47742 [2021-05-02 13:05:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 13:05:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 119. [2021-05-02 13:05:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 114 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2021-05-02 13:05:38,794 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 116 [2021-05-02 13:05:38,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:05:38,794 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2021-05-02 13:05:38,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 states have internal predecessors, (223), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:05:38,794 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2021-05-02 13:05:38,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 13:05:38,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:05:38,795 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:05:38,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:38,996 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:05:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:05:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash 390585528, now seen corresponding path program 53 times [2021-05-02 13:05:38,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:05:38,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916732345] [2021-05-02 13:05:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:05:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:40,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:05:40,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:40,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:05:40,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916732345] [2021-05-02 13:05:40,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916732345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:40,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412602040] [2021-05-02 13:05:40,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:41,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-02 13:05:41,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:05:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 13:05:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:05:41,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:41,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:43,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412602040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:43,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:05:43,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 112 [2021-05-02 13:05:43,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065679018] [2021-05-02 13:05:43,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 13:05:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:05:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 13:05:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4676, Invalid=7756, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 13:05:43,483 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 110 states have internal predecessors, (223), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:05:47,998 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2021-05-02 13:05:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 13:05:48,000 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 110 states have internal predecessors, (223), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 13:05:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:05:48,000 INFO L225 Difference]: With dead ends: 128 [2021-05-02 13:05:48,000 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 13:05:48,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8690 ImplicationChecksByTransitivity, 7490.3ms TimeCoverageRelationStatistics Valid=9351, Invalid=18371, Unknown=0, NotChecked=0, Total=27722 [2021-05-02 13:05:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 13:05:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 13:05:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 116 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2021-05-02 13:05:48,011 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 118 [2021-05-02 13:05:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:05:48,011 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2021-05-02 13:05:48,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 110 states have internal predecessors, (223), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2021-05-02 13:05:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 13:05:48,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:05:48,012 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:05:48,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 13:05:48,212 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:05:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:05:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1960577125, now seen corresponding path program 54 times [2021-05-02 13:05:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:05:48,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054473912] [2021-05-02 13:05:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:05:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:50,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:05:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:50,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:05:50,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054473912] [2021-05-02 13:05:50,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054473912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:50,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119164463] [2021-05-02 13:05:50,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:50,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 13:05:50,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:05:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 13:05:50,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:05:50,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:50,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:51,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:52,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119164463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:52,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:05:52,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 114 [2021-05-02 13:05:52,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135751347] [2021-05-02 13:05:52,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 13:05:52,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:05:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 13:05:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4845, Invalid=8037, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 13:05:52,985 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 112 states have internal predecessors, (227), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:05:57,517 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-05-02 13:05:57,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 13:05:57,518 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 112 states have internal predecessors, (227), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 13:05:57,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:05:57,519 INFO L225 Difference]: With dead ends: 130 [2021-05-02 13:05:57,519 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 13:05:57,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9016 ImplicationChecksByTransitivity, 7943.9ms TimeCoverageRelationStatistics Valid=9689, Invalid=19041, Unknown=0, NotChecked=0, Total=28730 [2021-05-02 13:05:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 13:05:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 13:05:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 118 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2021-05-02 13:05:57,530 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 120 [2021-05-02 13:05:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:05:57,530 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2021-05-02 13:05:57,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 112 states have internal predecessors, (227), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:05:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2021-05-02 13:05:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 13:05:57,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:05:57,531 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:05:57,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 13:05:57,731 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:05:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:05:57,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2019878334, now seen corresponding path program 55 times [2021-05-02 13:05:57,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:05:57,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444178674] [2021-05-02 13:05:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:05:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:59,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:05:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:05:59,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:05:59,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444178674] [2021-05-02 13:05:59,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444178674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:05:59,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338996092] [2021-05-02 13:05:59,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:05:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:05:59,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 13:05:59,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:05:59,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:05:59,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:00,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:01,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:02,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338996092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:02,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:02,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2021-05-02 13:06:02,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297124836] [2021-05-02 13:06:02,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 13:06:02,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 13:06:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5017, Invalid=8323, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 13:06:02,507 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 114 states have internal predecessors, (231), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:07,524 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2021-05-02 13:06:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 13:06:07,525 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 114 states have internal predecessors, (231), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 13:06:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:07,526 INFO L225 Difference]: With dead ends: 132 [2021-05-02 13:06:07,526 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 13:06:07,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9348 ImplicationChecksByTransitivity, 8145.5ms TimeCoverageRelationStatistics Valid=10033, Invalid=19723, Unknown=0, NotChecked=0, Total=29756 [2021-05-02 13:06:07,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 13:06:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 13:06:07,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.475) internal successors, (177), 120 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2021-05-02 13:06:07,536 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 122 [2021-05-02 13:06:07,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:07,536 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2021-05-02 13:06:07,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 114 states have internal predecessors, (231), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:07,537 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2021-05-02 13:06:07,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 13:06:07,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:07,537 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:07,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:07,743 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash 421713697, now seen corresponding path program 56 times [2021-05-02 13:06:07,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:07,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523605181] [2021-05-02 13:06:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:09,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:09,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523605181] [2021-05-02 13:06:09,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523605181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442440656] [2021-05-02 13:06:09,884 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:09,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:06:09,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 13:06:09,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:09,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:09,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:09,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:09,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:10,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:11,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442440656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 118 [2021-05-02 13:06:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582496888] [2021-05-02 13:06:12,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 13:06:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 13:06:12,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5192, Invalid=8614, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 13:06:12,929 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 116 states have internal predecessors, (235), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:18,217 INFO L93 Difference]: Finished difference Result 134 states and 192 transitions. [2021-05-02 13:06:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 13:06:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 116 states have internal predecessors, (235), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-02 13:06:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:18,219 INFO L225 Difference]: With dead ends: 134 [2021-05-02 13:06:18,219 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 13:06:18,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9686 ImplicationChecksByTransitivity, 8779.5ms TimeCoverageRelationStatistics Valid=10383, Invalid=20417, Unknown=0, NotChecked=0, Total=30800 [2021-05-02 13:06:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 13:06:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 13:06:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 122 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2021-05-02 13:06:18,232 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 124 [2021-05-02 13:06:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:18,232 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2021-05-02 13:06:18,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 116 states have internal predecessors, (235), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2021-05-02 13:06:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 13:06:18,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:18,233 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:18,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 13:06:18,441 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2111177788, now seen corresponding path program 57 times [2021-05-02 13:06:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:18,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195607502] [2021-05-02 13:06:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:21,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:21,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:21,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195607502] [2021-05-02 13:06:21,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195607502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:21,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226321368] [2021-05-02 13:06:21,058 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:21,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 13:06:21,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 13:06:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:21,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:21,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:22,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:23,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:06:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:24,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226321368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:24,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:24,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 120 [2021-05-02 13:06:24,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987008767] [2021-05-02 13:06:24,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 13:06:24,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:24,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 13:06:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5370, Invalid=8910, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 13:06:24,581 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 118 states have internal predecessors, (239), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:06:30,584 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2021-05-02 13:06:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 13:06:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 118 states have internal predecessors, (239), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-02 13:06:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:06:30,586 INFO L225 Difference]: With dead ends: 136 [2021-05-02 13:06:30,586 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 13:06:30,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10030 ImplicationChecksByTransitivity, 10139.6ms TimeCoverageRelationStatistics Valid=10739, Invalid=21123, Unknown=0, NotChecked=0, Total=31862 [2021-05-02 13:06:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 13:06:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 13:06:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.4758064516129032) internal successors, (183), 124 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2021-05-02 13:06:30,597 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 126 [2021-05-02 13:06:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:06:30,597 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2021-05-02 13:06:30,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 118 states have internal predecessors, (239), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:06:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2021-05-02 13:06:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 13:06:30,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:06:30,598 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:06:30,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:30,798 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:06:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:06:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -973438041, now seen corresponding path program 58 times [2021-05-02 13:06:30,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:06:30,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105048101] [2021-05-02 13:06:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:06:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:33,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:06:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:06:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:33,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:06:33,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105048101] [2021-05-02 13:06:33,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105048101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:33,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411092282] [2021-05-02 13:06:33,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:06:33,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:06:33,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:06:33,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 126 conjunts are in the unsatisfiable core [2021-05-02 13:06:33,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:06:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:06:39,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411092282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:06:39,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:06:39,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 64] total 125 [2021-05-02 13:06:39,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245433167] [2021-05-02 13:06:39,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 13:06:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:06:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 13:06:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=13539, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 13:06:39,357 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand has 125 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 123 states have internal predecessors, (247), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:07:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:13,586 INFO L93 Difference]: Finished difference Result 254 states and 373 transitions. [2021-05-02 13:07:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 13:07:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 123 states have internal predecessors, (247), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 128 [2021-05-02 13:07:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:13,588 INFO L225 Difference]: With dead ends: 254 [2021-05-02 13:07:13,588 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 13:07:13,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10740 ImplicationChecksByTransitivity, 27539.5ms TimeCoverageRelationStatistics Valid=9512, Invalid=49294, Unknown=0, NotChecked=0, Total=58806 [2021-05-02 13:07:13,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 13:07:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 131. [2021-05-02 13:07:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.4761904761904763) internal successors, (186), 126 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2021-05-02 13:07:13,601 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 128 [2021-05-02 13:07:13,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:13,602 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2021-05-02 13:07:13,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 123 states have internal predecessors, (247), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:07:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2021-05-02 13:07:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 13:07:13,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:13,603 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:13,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 13:07:13,803 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1472765642, now seen corresponding path program 59 times [2021-05-02 13:07:13,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:13,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629460746] [2021-05-02 13:07:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:17,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:07:17,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:17,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629460746] [2021-05-02 13:07:17,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629460746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:17,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882132837] [2021-05-02 13:07:17,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:17,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-05-02 13:07:17,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 13:07:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:17,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:17,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:18,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:19,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:20,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:07:21,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882132837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:21,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:21,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 124 [2021-05-02 13:07:21,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269678478] [2021-05-02 13:07:21,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 13:07:21,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 13:07:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5735, Invalid=9517, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 13:07:21,822 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 122 states have internal predecessors, (247), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:29,457 INFO L93 Difference]: Finished difference Result 140 states and 201 transitions. [2021-05-02 13:07:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 13:07:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 122 states have internal predecessors, (247), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 13:07:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:29,460 INFO L225 Difference]: With dead ends: 140 [2021-05-02 13:07:29,460 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 13:07:29,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10736 ImplicationChecksByTransitivity, 12959.0ms TimeCoverageRelationStatistics Valid=11469, Invalid=22571, Unknown=0, NotChecked=0, Total=34040 [2021-05-02 13:07:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 13:07:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-02 13:07:29,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.4765625) internal successors, (189), 128 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 193 transitions. [2021-05-02 13:07:29,485 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 193 transitions. Word has length 130 [2021-05-02 13:07:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:29,485 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 193 transitions. [2021-05-02 13:07:29,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 1.9919354838709677) internal successors, (247), 122 states have internal predecessors, (247), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:29,486 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 193 transitions. [2021-05-02 13:07:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 13:07:29,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:29,486 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:29,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 13:07:29,687 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1367573203, now seen corresponding path program 60 times [2021-05-02 13:07:29,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:29,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719015082] [2021-05-02 13:07:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:07:32,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719015082] [2021-05-02 13:07:32,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719015082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:32,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600226678] [2021-05-02 13:07:32,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:33,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-05-02 13:07:33,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:07:33,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 13:07:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:33,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:33,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:34,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:35,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:36,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:37,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:38,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:07:38,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600226678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:38,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:38,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 126 [2021-05-02 13:07:38,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693759269] [2021-05-02 13:07:38,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 13:07:38,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 13:07:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5922, Invalid=9828, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 13:07:38,084 INFO L87 Difference]: Start difference. First operand 133 states and 193 transitions. Second operand has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 124 states have internal predecessors, (251), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:07:45,725 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2021-05-02 13:07:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 13:07:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 124 states have internal predecessors, (251), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-02 13:07:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:07:45,728 INFO L225 Difference]: With dead ends: 142 [2021-05-02 13:07:45,728 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 13:07:45,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11098 ImplicationChecksByTransitivity, 13319.8ms TimeCoverageRelationStatistics Valid=11843, Invalid=23313, Unknown=0, NotChecked=0, Total=35156 [2021-05-02 13:07:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 13:07:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-05-02 13:07:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2021-05-02 13:07:45,740 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 132 [2021-05-02 13:07:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:07:45,740 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2021-05-02 13:07:45,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 1.992063492063492) internal successors, (251), 124 states have internal predecessors, (251), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:07:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2021-05-02 13:07:45,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 13:07:45,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:07:45,741 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:07:45,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:45,942 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:07:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:07:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash 665997008, now seen corresponding path program 61 times [2021-05-02 13:07:45,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:07:45,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935441548] [2021-05-02 13:07:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:07:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:49,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:07:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:07:49,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:07:49,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935441548] [2021-05-02 13:07:49,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935441548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:49,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289434675] [2021-05-02 13:07:49,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:07:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:07:50,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 13:07:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:07:50,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:50,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:52,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:53,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:54,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:07:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:07:55,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289434675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:07:55,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:07:55,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2021-05-02 13:07:55,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701269156] [2021-05-02 13:07:55,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 13:07:55,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:07:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 13:07:55,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6112, Invalid=10144, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 13:07:55,892 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 126 states have internal predecessors, (255), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:04,927 INFO L93 Difference]: Finished difference Result 144 states and 207 transitions. [2021-05-02 13:08:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 13:08:04,930 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 126 states have internal predecessors, (255), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-02 13:08:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:04,931 INFO L225 Difference]: With dead ends: 144 [2021-05-02 13:08:04,931 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 13:08:04,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11466 ImplicationChecksByTransitivity, 15758.0ms TimeCoverageRelationStatistics Valid=12223, Invalid=24067, Unknown=0, NotChecked=0, Total=36290 [2021-05-02 13:08:04,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 13:08:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 13:08:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 132 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 199 transitions. [2021-05-02 13:08:04,944 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 199 transitions. Word has length 134 [2021-05-02 13:08:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:04,945 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 199 transitions. [2021-05-02 13:08:04,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 1.9921875) internal successors, (255), 126 states have internal predecessors, (255), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 199 transitions. [2021-05-02 13:08:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 13:08:04,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:04,946 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:05,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:05,161 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 716850099, now seen corresponding path program 62 times [2021-05-02 13:08:05,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:05,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897011247] [2021-05-02 13:08:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:09,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:08:09,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:09,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897011247] [2021-05-02 13:08:09,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897011247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:09,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968368124] [2021-05-02 13:08:09,117 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:09,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:08:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:09,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 13:08:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:09,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:09,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:10,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:11,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:12,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:08:14,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968368124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:14,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:14,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 130 [2021-05-02 13:08:14,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203424895] [2021-05-02 13:08:14,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 13:08:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 13:08:14,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6305, Invalid=10465, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 13:08:14,955 INFO L87 Difference]: Start difference. First operand 137 states and 199 transitions. Second operand has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 128 states have internal predecessors, (259), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:24,866 INFO L93 Difference]: Finished difference Result 146 states and 210 transitions. [2021-05-02 13:08:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 13:08:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 128 states have internal predecessors, (259), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-02 13:08:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:24,869 INFO L225 Difference]: With dead ends: 146 [2021-05-02 13:08:24,869 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 13:08:24,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11840 ImplicationChecksByTransitivity, 16751.4ms TimeCoverageRelationStatistics Valid=12609, Invalid=24833, Unknown=0, NotChecked=0, Total=37442 [2021-05-02 13:08:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 13:08:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-05-02 13:08:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.4776119402985075) internal successors, (198), 134 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 202 transitions. [2021-05-02 13:08:24,888 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 202 transitions. Word has length 136 [2021-05-02 13:08:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:24,888 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 202 transitions. [2021-05-02 13:08:24,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 1.9923076923076923) internal successors, (259), 128 states have internal predecessors, (259), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 202 transitions. [2021-05-02 13:08:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 13:08:24,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:24,889 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:25,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:25,105 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1952937002, now seen corresponding path program 63 times [2021-05-02 13:08:25,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:25,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327659715] [2021-05-02 13:08:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:29,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:08:29,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:29,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327659715] [2021-05-02 13:08:29,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327659715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:29,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815036977] [2021-05-02 13:08:29,902 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:30,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-02 13:08:30,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 13:08:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:08:30,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:30,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:31,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:32,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:33,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:34,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:35,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:08:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:08:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815036977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:36,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:08:36,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 132 [2021-05-02 13:08:36,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128863038] [2021-05-02 13:08:36,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 13:08:36,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:08:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 13:08:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6501, Invalid=10791, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 13:08:36,840 INFO L87 Difference]: Start difference. First operand 139 states and 202 transitions. Second operand has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 130 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:08:46,852 INFO L93 Difference]: Finished difference Result 148 states and 213 transitions. [2021-05-02 13:08:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 13:08:46,854 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 130 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-02 13:08:46,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:08:46,856 INFO L225 Difference]: With dead ends: 148 [2021-05-02 13:08:46,856 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 13:08:46,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12220 ImplicationChecksByTransitivity, 18305.1ms TimeCoverageRelationStatistics Valid=13001, Invalid=25611, Unknown=0, NotChecked=0, Total=38612 [2021-05-02 13:08:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 13:08:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-05-02 13:08:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.4779411764705883) internal successors, (201), 136 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 205 transitions. [2021-05-02 13:08:46,868 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 205 transitions. Word has length 138 [2021-05-02 13:08:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:08:46,869 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 205 transitions. [2021-05-02 13:08:46,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 1.9924242424242424) internal successors, (263), 130 states have internal predecessors, (263), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:08:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 205 transitions. [2021-05-02 13:08:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 13:08:46,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:08:46,870 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:08:47,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:47,073 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:08:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:08:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash 772101945, now seen corresponding path program 64 times [2021-05-02 13:08:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:08:47,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979477399] [2021-05-02 13:08:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:08:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:51,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:08:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:08:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:08:51,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:08:51,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979477399] [2021-05-02 13:08:51,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979477399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:08:51,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127389061] [2021-05-02 13:08:51,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:08:51,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:08:51,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:08:51,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 138 conjunts are in the unsatisfiable core [2021-05-02 13:08:51,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:09:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:09:02,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127389061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:09:02,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:09:02,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 70] total 137 [2021-05-02 13:09:02,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061507149] [2021-05-02 13:09:02,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-02 13:09:02,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:09:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-02 13:09:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=16278, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 13:09:02,492 INFO L87 Difference]: Start difference. First operand 141 states and 205 transitions. Second operand has 137 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 135 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:09:08,351 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:12,275 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:13,071 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:18,214 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:22,536 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:27,268 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:28,444 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:29,566 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:32,908 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:34,203 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:35,405 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:36,596 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:37,973 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:39,360 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:40,683 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:41,963 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:43,168 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:44,407 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:45,670 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:46,977 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:48,275 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:49,665 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:50,805 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:52,278 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:53,700 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:55,108 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:56,508 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:57,837 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:09:59,350 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:00,761 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 13:10:02,448 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:04,070 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:05,996 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:07,944 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:09,837 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 13:10:11,356 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:13,157 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:15,016 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:10:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:18,122 INFO L93 Difference]: Finished difference Result 278 states and 409 transitions. [2021-05-02 13:10:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 13:10:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 135 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 140 [2021-05-02 13:10:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:18,128 INFO L225 Difference]: With dead ends: 278 [2021-05-02 13:10:18,128 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 13:10:18,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13002 ImplicationChecksByTransitivity, 54543.4ms TimeCoverageRelationStatistics Valid=11453, Invalid=59569, Unknown=0, NotChecked=0, Total=71022 [2021-05-02 13:10:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 13:10:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 143. [2021-05-02 13:10:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.4782608695652173) internal successors, (204), 138 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 208 transitions. [2021-05-02 13:10:18,146 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 208 transitions. Word has length 140 [2021-05-02 13:10:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:18,146 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 208 transitions. [2021-05-02 13:10:18,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 135 states have internal predecessors, (271), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:10:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 208 transitions. [2021-05-02 13:10:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 13:10:18,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:18,147 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:18,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:18,349 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash -395520548, now seen corresponding path program 65 times [2021-05-02 13:10:18,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:18,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981331330] [2021-05-02 13:10:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:26,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:10:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:10:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:10:26,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:10:26,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981331330] [2021-05-02 13:10:26,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981331330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:26,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296039388] [2021-05-02 13:10:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:10:26,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-02 13:10:26,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:10:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 13:10:26,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:10:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:27,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:28,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:29,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:30,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:31,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:32,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:33,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:34,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:35,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:36,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:37,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:10:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:10:38,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296039388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:10:38,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:10:38,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 136 [2021-05-02 13:10:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676049300] [2021-05-02 13:10:38,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 13:10:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:10:38,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 13:10:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6902, Invalid=11458, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 13:10:38,234 INFO L87 Difference]: Start difference. First operand 143 states and 208 transitions. Second operand has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 134 states have internal predecessors, (271), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:45,467 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:10:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:10:53,939 INFO L93 Difference]: Finished difference Result 152 states and 219 transitions. [2021-05-02 13:10:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 13:10:53,943 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 134 states have internal predecessors, (271), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-02 13:10:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:10:53,944 INFO L225 Difference]: With dead ends: 152 [2021-05-02 13:10:53,944 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 13:10:53,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12998 ImplicationChecksByTransitivity, 30000.0ms TimeCoverageRelationStatistics Valid=13803, Invalid=27203, Unknown=0, NotChecked=0, Total=41006 [2021-05-02 13:10:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 13:10:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 13:10:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2021-05-02 13:10:53,958 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 142 [2021-05-02 13:10:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:10:53,958 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2021-05-02 13:10:53,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 1.9926470588235294) internal successors, (271), 134 states have internal predecessors, (271), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:10:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2021-05-02 13:10:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 13:10:53,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:10:53,959 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:10:54,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-02 13:10:54,160 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:10:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:10:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1494272065, now seen corresponding path program 66 times [2021-05-02 13:10:54,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:10:54,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568197540] [2021-05-02 13:10:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:10:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:01,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:11:02,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568197540] [2021-05-02 13:11:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568197540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672129526] [2021-05-02 13:11:02,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:02,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-02 13:11:02,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:11:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 13:11:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:02,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:02,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:03,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:04,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:05,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:06,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:07,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:08,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:09,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:10,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:11,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:11,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:11,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:11,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:11,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:11,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:12,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:14,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:11:14,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672129526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:14,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:14,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 138 [2021-05-02 13:11:14,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477635667] [2021-05-02 13:11:14,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 13:11:14,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:14,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 13:11:14,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7107, Invalid=11799, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 13:11:14,164 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 138 states, 138 states have (on average 1.9927536231884058) internal successors, (275), 136 states have internal predecessors, (275), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:11:32,446 INFO L93 Difference]: Finished difference Result 154 states and 222 transitions. [2021-05-02 13:11:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 13:11:32,450 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.9927536231884058) internal successors, (275), 136 states have internal predecessors, (275), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-02 13:11:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:11:32,451 INFO L225 Difference]: With dead ends: 154 [2021-05-02 13:11:32,451 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 13:11:32,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13396 ImplicationChecksByTransitivity, 31947.5ms TimeCoverageRelationStatistics Valid=14213, Invalid=28017, Unknown=0, NotChecked=0, Total=42230 [2021-05-02 13:11:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 13:11:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-05-02 13:11:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.4788732394366197) internal successors, (210), 142 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 214 transitions. [2021-05-02 13:11:32,473 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 214 transitions. Word has length 144 [2021-05-02 13:11:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:11:32,473 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 214 transitions. [2021-05-02 13:11:32,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 1.9927536231884058) internal successors, (275), 136 states have internal predecessors, (275), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:11:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 214 transitions. [2021-05-02 13:11:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 13:11:32,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:11:32,474 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:11:32,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 13:11:32,693 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:11:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:11:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash -832525086, now seen corresponding path program 67 times [2021-05-02 13:11:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:11:32,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902374192] [2021-05-02 13:11:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:11:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:11:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:11:42,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:11:42,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902374192] [2021-05-02 13:11:42,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902374192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:42,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525807541] [2021-05-02 13:11:42,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:11:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:11:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 13:11:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:11:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:42,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:43,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:44,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:45,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:46,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:47,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:48,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:49,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:52,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:53,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:54,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:54,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:54,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:54,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:54,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:54,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:55,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:56,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:56,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:56,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:56,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:11:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:11:56,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525807541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:11:56,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:11:56,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 140 [2021-05-02 13:11:56,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362702660] [2021-05-02 13:11:56,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 13:11:56,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:11:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 13:11:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7315, Invalid=12145, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 13:11:56,835 INFO L87 Difference]: Start difference. First operand 147 states and 214 transitions. Second operand has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 138 states have internal predecessors, (279), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:12:16,908 INFO L93 Difference]: Finished difference Result 156 states and 225 transitions. [2021-05-02 13:12:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 13:12:16,913 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 138 states have internal predecessors, (279), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-05-02 13:12:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:12:16,914 INFO L225 Difference]: With dead ends: 156 [2021-05-02 13:12:16,914 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 13:12:16,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13800 ImplicationChecksByTransitivity, 37174.3ms TimeCoverageRelationStatistics Valid=14629, Invalid=28843, Unknown=0, NotChecked=0, Total=43472 [2021-05-02 13:12:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 13:12:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-02 13:12:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.4791666666666667) internal successors, (213), 144 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 217 transitions. [2021-05-02 13:12:16,937 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 217 transitions. Word has length 146 [2021-05-02 13:12:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:12:16,937 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 217 transitions. [2021-05-02 13:12:16,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 1.9928571428571429) internal successors, (279), 138 states have internal predecessors, (279), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 217 transitions. [2021-05-02 13:12:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 13:12:16,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:12:16,938 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:12:17,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:17,165 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:12:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:12:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -548838075, now seen corresponding path program 68 times [2021-05-02 13:12:17,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:12:17,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521671414] [2021-05-02 13:12:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:12:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:27,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:12:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:12:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:12:27,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:12:27,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521671414] [2021-05-02 13:12:27,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521671414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:27,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981092714] [2021-05-02 13:12:27,186 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:12:27,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:12:27,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:12:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 13:12:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:12:27,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:27,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:28,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:29,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:30,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:31,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:33,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:34,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:35,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:36,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:36,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:36,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:36,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:36,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:36,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:37,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:37,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:37,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:38,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:39,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:39,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:39,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:39,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:39,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:39,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:40,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:12:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:12:41,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981092714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:12:41,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:12:41,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 142 [2021-05-02 13:12:41,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906912372] [2021-05-02 13:12:41,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-02 13:12:41,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:12:41,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-02 13:12:41,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7526, Invalid=12496, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 13:12:41,733 INFO L87 Difference]: Start difference. First operand 149 states and 217 transitions. Second operand has 142 states, 142 states have (on average 1.9929577464788732) internal successors, (283), 140 states have internal predecessors, (283), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:12:45,541 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:02,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:02,359 INFO L93 Difference]: Finished difference Result 158 states and 228 transitions. [2021-05-02 13:13:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 13:13:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.9929577464788732) internal successors, (283), 140 states have internal predecessors, (283), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-05-02 13:13:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:02,364 INFO L225 Difference]: With dead ends: 158 [2021-05-02 13:13:02,364 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 13:13:02,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14210 ImplicationChecksByTransitivity, 37936.0ms TimeCoverageRelationStatistics Valid=15051, Invalid=29681, Unknown=0, NotChecked=0, Total=44732 [2021-05-02 13:13:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 13:13:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-02 13:13:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 220 transitions. [2021-05-02 13:13:02,381 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 220 transitions. Word has length 148 [2021-05-02 13:13:02,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:02,381 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 220 transitions. [2021-05-02 13:13:02,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 1.9929577464788732) internal successors, (283), 140 states have internal predecessors, (283), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:02,381 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 220 transitions. [2021-05-02 13:13:02,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 13:13:02,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:02,382 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:02,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-02 13:13:02,609 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:02,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1491439848, now seen corresponding path program 69 times [2021-05-02 13:13:02,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:02,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940427321] [2021-05-02 13:13:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:13,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:13:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:13:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:13:13,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:13:13,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940427321] [2021-05-02 13:13:13,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940427321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:13,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207220957] [2021-05-02 13:13:13,798 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:13:13,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-05-02 13:13:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:13:13,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 13:13:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:13:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:14,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:15,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:16,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:17,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:19,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:20,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:21,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:22,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:22,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:22,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:22,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:22,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:24,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:26,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:26,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:26,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:26,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:27,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:29,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:30,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:30,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:30,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:30,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:13:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:13:30,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207220957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:13:30,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:13:30,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 144 [2021-05-02 13:13:30,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729448993] [2021-05-02 13:13:30,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-02 13:13:30,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:13:30,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-02 13:13:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7740, Invalid=12852, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 13:13:30,936 INFO L87 Difference]: Start difference. First operand 151 states and 220 transitions. Second operand has 144 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 142 states have internal predecessors, (287), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:32,267 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:32,447 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:32,622 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:32,995 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:33,206 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:33,411 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:34,027 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:34,255 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:34,489 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:38,322 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:13:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:13:53,317 INFO L93 Difference]: Finished difference Result 160 states and 231 transitions. [2021-05-02 13:13:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 13:13:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 142 states have internal predecessors, (287), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-02 13:13:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:13:53,324 INFO L225 Difference]: With dead ends: 160 [2021-05-02 13:13:53,324 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 13:13:53,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14626 ImplicationChecksByTransitivity, 42694.6ms TimeCoverageRelationStatistics Valid=15479, Invalid=30531, Unknown=0, NotChecked=0, Total=46010 [2021-05-02 13:13:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 13:13:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-02 13:13:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.4797297297297298) internal successors, (219), 148 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 223 transitions. [2021-05-02 13:13:53,341 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 223 transitions. Word has length 150 [2021-05-02 13:13:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:13:53,341 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 223 transitions. [2021-05-02 13:13:53,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 144 states, 144 states have (on average 1.9930555555555556) internal successors, (287), 142 states have internal predecessors, (287), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:13:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 223 transitions. [2021-05-02 13:13:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 13:13:53,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:13:53,342 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:13:53,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 13:13:53,543 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:13:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:13:53,544 INFO L82 PathProgramCache]: Analyzing trace with hash -601530421, now seen corresponding path program 70 times [2021-05-02 13:13:53,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:13:53,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438725573] [2021-05-02 13:13:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:13:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:07,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:14:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:14:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:14:07,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:14:07,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438725573] [2021-05-02 13:14:07,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438725573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:07,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788171143] [2021-05-02 13:14:07,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:14:07,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:14:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:14:07,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 150 conjunts are in the unsatisfiable core [2021-05-02 13:14:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:14:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:14:43,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788171143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:14:43,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:14:43,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 76] total 149 [2021-05-02 13:14:43,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200333363] [2021-05-02 13:14:43,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 149 states [2021-05-02 13:14:43,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:14:43,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2021-05-02 13:14:43,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=19269, Unknown=0, NotChecked=0, Total=22052 [2021-05-02 13:14:43,007 INFO L87 Difference]: Start difference. First operand 153 states and 223 transitions. Second operand has 149 states, 148 states have (on average 1.9932432432432432) internal successors, (295), 147 states have internal predecessors, (295), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:14:44,560 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 13:14:45,111 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 13:14:46,160 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 13:14:47,060 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:14:48,159 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:14:49,325 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:14:50,533 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:14:51,522 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:14:52,729 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:14:53,723 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:14:54,905 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:14:55,887 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:14:57,258 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-02 13:14:58,371 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-02 13:14:59,684 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39