/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:51:20,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:51:20,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:51:20,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:51:20,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:51:20,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:51:20,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:51:20,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:51:20,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:51:20,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:51:20,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:51:20,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:51:20,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:51:20,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:51:20,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:51:20,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:51:20,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:51:20,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:51:20,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:51:20,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:51:20,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:51:20,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:51:20,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:51:20,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:51:20,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:51:20,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:51:20,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:51:20,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:51:20,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:51:20,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:51:20,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:51:20,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:51:20,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:51:20,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:51:20,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:51:20,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:51:20,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:51:20,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:51:20,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:51:20,511 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:51:20,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:51:20,512 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:51:20,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:51:20,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:51:20,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:51:20,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:51:20,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:51:20,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:51:20,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:51:20,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:51:20,514 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:51:20,514 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:51:20,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:51:20,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:51:20,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:51:20,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:51:20,838 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:51:20,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-02 22:51:20,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8471b8f2c/4cb24c1c7cd640ecbbc9384c8d7478dd/FLAG565636e87 [2021-05-02 22:51:21,284 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:51:21,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-02 22:51:21,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8471b8f2c/4cb24c1c7cd640ecbbc9384c8d7478dd/FLAG565636e87 [2021-05-02 22:51:21,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8471b8f2c/4cb24c1c7cd640ecbbc9384c8d7478dd [2021-05-02 22:51:21,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:51:21,726 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:51:21,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:21,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:51:21,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:51:21,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bec0d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21, skipping insertion in model container [2021-05-02 22:51:21,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:51:21,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:51:21,860 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c[520,533] [2021-05-02 22:51:21,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:21,880 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:51:21,890 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c[520,533] [2021-05-02 22:51:21,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:51:21,907 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:51:21,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21 WrapperNode [2021-05-02 22:51:21,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:51:21,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:51:21,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:51:21,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:51:21,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (1/1) ... [2021-05-02 22:51:21,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:51:21,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:51:21,995 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:51:21,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:51:21,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (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 22:51:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:51:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:51:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:51:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:51:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:51:22,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:51:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:51:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:51:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:51:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:51:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 22:51:22,075 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:51:22,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:51:22,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:51:22,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:51:22,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:51:22,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:51:22,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:51:22,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:51:22,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:51:22,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:51:22,364 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:51:22,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:22 BoogieIcfgContainer [2021-05-02 22:51:22,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:51:22,366 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:51:22,367 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:51:22,367 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:51:22,386 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:22" (1/1) ... [2021-05-02 22:51:22,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:22 BasicIcfg [2021-05-02 22:51:22,416 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:51:22,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:51:22,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:51:22,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:51:22,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:51:21" (1/4) ... [2021-05-02 22:51:22,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293bb81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:22, skipping insertion in model container [2021-05-02 22:51:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:51:21" (2/4) ... [2021-05-02 22:51:22,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293bb81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:51:22, skipping insertion in model container [2021-05-02 22:51:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:51:22" (3/4) ... [2021-05-02 22:51:22,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293bb81e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:51:22, skipping insertion in model container [2021-05-02 22:51:22,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:51:22" (4/4) ... [2021-05-02 22:51:22,423 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.cJordan [2021-05-02 22:51:22,439 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:51:22,442 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:51:22,459 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:51:22,488 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:51:22,489 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:51:22,489 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:51:22,489 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:51:22,489 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:51:22,489 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:51:22,489 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:51:22,489 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:51:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:51:22,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:22,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:22,513 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:22,513 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:22,519 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-02 22:51:22,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:22,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594391053] [2021-05-02 22:51:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:22,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:22,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:22,767 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 22:51:22,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:22,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594391053] [2021-05-02 22:51:22,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594391053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:22,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:22,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:51:22,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404373429] [2021-05-02 22:51:22,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:51:22,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:51:22,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:22,786 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:22,906 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 22:51:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:51:22,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:22,915 INFO L225 Difference]: With dead ends: 31 [2021-05-02 22:51:22,915 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:51:22,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:51:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:51:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:51:22,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:51:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 22:51:22,947 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 22:51:22,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:22,948 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 22:51:22,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:22,948 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 22:51:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:51:22,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:22,949 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:22,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:51:22,949 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-02 22:51:22,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:22,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853225096] [2021-05-02 22:51:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:23,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:51:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:23,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:51:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:23,114 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 22:51:23,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:23,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853225096] [2021-05-02 22:51:23,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853225096] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:51:23,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:51:23,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 22:51:23,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504997411] [2021-05-02 22:51:23,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:23,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:23,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:23,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:23,117 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:23,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:23,544 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 22:51:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:51:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:23,548 INFO L225 Difference]: With dead ends: 38 [2021-05-02 22:51:23,548 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 22:51:23,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:23,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 22:51:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 22:51:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:51:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 22:51:23,571 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 22:51:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:23,571 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 22:51:23,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:51:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 22:51:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:51:23,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:23,575 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:23,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 22:51:23,577 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:23,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-02 22:51:23,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:23,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718374684] [2021-05-02 22:51:23,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:23,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:23,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009227664] [2021-05-02 22:51:23,596 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 22:51:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:23,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:51:23,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:51:23,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:23,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718374684] [2021-05-02 22:51:23,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:23,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009227664] [2021-05-02 22:51:23,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009227664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:23,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:23,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:23,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248534528] [2021-05-02 22:51:23,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:23,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:23,821 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:23,959 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 22:51:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:51:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:23,961 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:51:23,962 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 22:51:23,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 22:51:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 22:51:23,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:51:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 22:51:23,972 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 22:51:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:23,972 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 22:51:23,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:51:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 22:51:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:51:23,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:23,974 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:24,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 22:51:24,187 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:24,188 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-02 22:51:24,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:24,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514537608] [2021-05-02 22:51:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:24,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:24,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985735439] [2021-05-02 22:51:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:51:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:51:24,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:24,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514537608] [2021-05-02 22:51:24,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:24,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985735439] [2021-05-02 22:51:24,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985735439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:24,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:24,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:51:24,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813235486] [2021-05-02 22:51:24,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:51:24,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:51:24,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:51:24,386 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:24,473 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-05-02 22:51:24,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:51:24,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 22:51:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:24,477 INFO L225 Difference]: With dead ends: 51 [2021-05-02 22:51:24,477 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:51:24,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:51:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 22:51:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:51:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 22:51:24,488 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 22:51:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:24,489 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 22:51:24,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 22:51:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 22:51:24,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 22:51:24,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:24,490 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:24,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:24,705 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-02 22:51:24,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:24,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160069465] [2021-05-02 22:51:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:24,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:24,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436276927] [2021-05-02 22:51:24,722 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 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 22:51:24,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:24,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:24,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 22:51:24,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160069465] [2021-05-02 22:51:24,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436276927] [2021-05-02 22:51:24,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436276927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:24,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:24,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:24,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463146068] [2021-05-02 22:51:24,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:24,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:24,965 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:25,109 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 22:51:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 22:51:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:25,118 INFO L225 Difference]: With dead ends: 55 [2021-05-02 22:51:25,118 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:51:25,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:51:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 22:51:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:51:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 22:51:25,138 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 22:51:25,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:25,139 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 22:51:25,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 22:51:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 22:51:25,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:51:25,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:25,142 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:25,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:25,343 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:25,343 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-02 22:51:25,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:25,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102050455] [2021-05-02 22:51:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:25,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:25,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054181218] [2021-05-02 22:51:25,351 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 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 22:51:25,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:51:25,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:51:25,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:25,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 22:51:25,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:25,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102050455] [2021-05-02 22:51:25,584 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054181218] [2021-05-02 22:51:25,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054181218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:25,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:25,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:25,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040414151] [2021-05-02 22:51:25,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:25,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:25,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:25,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:25,585 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:25,687 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-02 22:51:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 22:51:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:25,688 INFO L225 Difference]: With dead ends: 59 [2021-05-02 22:51:25,688 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 22:51:25,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 22:51:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 22:51:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:51:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 22:51:25,693 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 22:51:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:25,693 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 22:51:25,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 22:51:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 22:51:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 22:51:25,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:25,695 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:25,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:25,901 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-02 22:51:25,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:25,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146729492] [2021-05-02 22:51:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:25,915 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:25,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107659777] [2021-05-02 22:51:25,915 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 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 22:51:25,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:51:25,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 22:51:25,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 22:51:26,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:26,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146729492] [2021-05-02 22:51:26,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:26,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107659777] [2021-05-02 22:51:26,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107659777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:26,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:26,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:51:26,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393527839] [2021-05-02 22:51:26,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:51:26,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:26,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:51:26,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:51:26,107 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:26,198 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-02 22:51:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:51:26,198 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 22:51:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:26,205 INFO L225 Difference]: With dead ends: 68 [2021-05-02 22:51:26,205 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 22:51:26,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 22:51:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 22:51:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:51:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 22:51:26,218 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 51 [2021-05-02 22:51:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:26,219 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 22:51:26,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:26,219 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 22:51:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 22:51:26,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:26,226 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:26,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:51:26,450 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:26,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-02 22:51:26,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:26,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115049232] [2021-05-02 22:51:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:26,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:26,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092285282] [2021-05-02 22:51:26,460 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 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 22:51:26,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 22:51:26,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:26,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:51:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 22:51:26,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115049232] [2021-05-02 22:51:26,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:26,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092285282] [2021-05-02 22:51:26,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092285282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:26,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:26,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:26,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208333960] [2021-05-02 22:51:26,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:26,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:26,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:26,661 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 22:51:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:26,806 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-02 22:51:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:51:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 22:51:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:26,808 INFO L225 Difference]: With dead ends: 72 [2021-05-02 22:51:26,808 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 22:51:26,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:26,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 22:51:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 22:51:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:51:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-05-02 22:51:26,813 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 56 [2021-05-02 22:51:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:26,814 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-05-02 22:51:26,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 22:51:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-05-02 22:51:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:51:26,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:26,815 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:27,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:27,021 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-02 22:51:27,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:27,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492132710] [2021-05-02 22:51:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:27,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:27,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930890724] [2021-05-02 22:51:27,030 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 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 22:51:27,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 22:51:27,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:27,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 22:51:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:27,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 22:51:27,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:27,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492132710] [2021-05-02 22:51:27,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:27,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930890724] [2021-05-02 22:51:27,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930890724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:27,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:27,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:51:27,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850227170] [2021-05-02 22:51:27,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:51:27,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:51:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:51:27,368 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:27,552 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-02 22:51:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:27,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 22:51:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:27,553 INFO L225 Difference]: With dead ends: 76 [2021-05-02 22:51:27,553 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 22:51:27,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:51:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 22:51:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 22:51:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 12 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:51:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-05-02 22:51:27,559 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 61 [2021-05-02 22:51:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:27,559 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-05-02 22:51:27,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 22:51:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-05-02 22:51:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:51:27,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:27,560 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:27,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:27,773 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:27,774 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-02 22:51:27,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:27,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43374490] [2021-05-02 22:51:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:27,782 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:27,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001822207] [2021-05-02 22:51:27,782 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 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 22:51:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:51:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 22:51:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 22:51:28,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43374490] [2021-05-02 22:51:28,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001822207] [2021-05-02 22:51:28,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001822207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:28,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:28,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:51:28,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281356581] [2021-05-02 22:51:28,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:51:28,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:51:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:51:28,038 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:28,132 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-05-02 22:51:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:51:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-02 22:51:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:28,133 INFO L225 Difference]: With dead ends: 85 [2021-05-02 22:51:28,133 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 22:51:28,134 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:51:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 22:51:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 22:51:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.0625) internal successors, (51), 50 states have internal predecessors, (51), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:51:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-05-02 22:51:28,139 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 68 [2021-05-02 22:51:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:28,139 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-05-02 22:51:28,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 22:51:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2021-05-02 22:51:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 22:51:28,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:28,140 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:28,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:51:28,349 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1331766697, now seen corresponding path program 8 times [2021-05-02 22:51:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:28,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436726] [2021-05-02 22:51:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:28,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:28,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504061214] [2021-05-02 22:51:28,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:28,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:51:28,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:28,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 22:51:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 22:51:28,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:28,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436726] [2021-05-02 22:51:28,647 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:28,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504061214] [2021-05-02 22:51:28,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504061214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:28,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:28,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:51:28,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330894521] [2021-05-02 22:51:28,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:51:28,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:28,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:51:28,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:51:28,649 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:28,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:51:28,842 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-05-02 22:51:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:51:28,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2021-05-02 22:51:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:51:28,845 INFO L225 Difference]: With dead ends: 89 [2021-05-02 22:51:28,846 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 22:51:28,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:51:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 22:51:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-05-02 22:51:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:51:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-05-02 22:51:28,859 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 73 [2021-05-02 22:51:28,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:51:28,860 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-05-02 22:51:28,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 22:51:28,860 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-05-02 22:51:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 22:51:28,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:51:28,861 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:51:29,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:29,084 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:51:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:51:29,085 INFO L82 PathProgramCache]: Analyzing trace with hash -715048783, now seen corresponding path program 9 times [2021-05-02 22:51:29,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:51:29,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623212201] [2021-05-02 22:51:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:51:29,096 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:51:29,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944944251] [2021-05-02 22:51:29,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:51:29,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 22:51:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:51:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:51:29,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:51:29,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:29,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:29,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:42,862 WARN L205 SmtUtils]: Spent 6.99 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 22:51:42,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:42,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:51:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-02 22:51:42,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:51:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623212201] [2021-05-02 22:51:42,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:51:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944944251] [2021-05-02 22:51:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944944251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:51:42,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:51:42,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:51:42,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468622768] [2021-05-02 22:51:42,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:51:42,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:51:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:51:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=52, Unknown=2, NotChecked=0, Total=72 [2021-05-02 22:51:42,904 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:51:50,953 WARN L205 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-02 22:52:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:11,165 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-05-02 22:52:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:52:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-02 22:52:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:11,167 INFO L225 Difference]: With dead ends: 100 [2021-05-02 22:52:11,167 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 22:52:11,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 21532.4ms TimeCoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2021-05-02 22:52:11,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 22:52:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 22:52:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:52:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-05-02 22:52:11,171 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 78 [2021-05-02 22:52:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:11,172 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-05-02 22:52:11,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 22:52:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-05-02 22:52:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 22:52:11,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:52:11,173 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:52:11,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:52:11,389 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:52:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:52:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash -782935442, now seen corresponding path program 10 times [2021-05-02 22:52:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:52:11,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523976386] [2021-05-02 22:52:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:52:11,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:52:11,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131697991] [2021-05-02 22:52:11,395 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 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 22:52:11,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:52:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:52:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 22:52:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:52:11,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:52:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 47 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 22:52:11,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:52:11,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523976386] [2021-05-02 22:52:11,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:52:11,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131697991] [2021-05-02 22:52:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131697991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:52:11,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:52:11,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:52:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836255710] [2021-05-02 22:52:11,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:52:11,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:52:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:52:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:52:11,825 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 22:52:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:52:11,900 INFO L93 Difference]: Finished difference Result 80 states and 79 transitions. [2021-05-02 22:52:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:52:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 22:52:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:52:11,901 INFO L225 Difference]: With dead ends: 80 [2021-05-02 22:52:11,902 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:52:11,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:52:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:52:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:52:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 22:52:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:52:11,902 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-05-02 22:52:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:52:11,902 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:52:11,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 22:52:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:52:11,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:52:12,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 22:52:12,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:52:12 BasicIcfg [2021-05-02 22:52:12,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:52:12,122 INFO L168 Benchmark]: Toolchain (without parser) took 50395.79 ms. Allocated memory was 188.7 MB in the beginning and 283.1 MB in the end (delta: 94.4 MB). Free memory was 153.5 MB in the beginning and 115.1 MB in the end (delta: 38.4 MB). Peak memory consumption was 132.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:12,122 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 170.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:52:12,122 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.25 ms. Allocated memory is still 188.7 MB. Free memory was 153.3 MB in the beginning and 143.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:12,122 INFO L168 Benchmark]: Boogie Preprocessor took 84.74 ms. Allocated memory is still 188.7 MB. Free memory was 143.6 MB in the beginning and 172.0 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:12,122 INFO L168 Benchmark]: RCFGBuilder took 370.67 ms. Allocated memory is still 188.7 MB. Free memory was 172.0 MB in the beginning and 157.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:12,122 INFO L168 Benchmark]: IcfgTransformer took 49.64 ms. Allocated memory is still 188.7 MB. Free memory was 157.7 MB in the beginning and 156.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:12,122 INFO L168 Benchmark]: TraceAbstraction took 49704.21 ms. Allocated memory was 188.7 MB in the beginning and 283.1 MB in the end (delta: 94.4 MB). Free memory was 156.0 MB in the beginning and 115.1 MB in the end (delta: 41.0 MB). Peak memory consumption was 136.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:52:12,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 170.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 179.25 ms. Allocated memory is still 188.7 MB. Free memory was 153.3 MB in the beginning and 143.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 84.74 ms. Allocated memory is still 188.7 MB. Free memory was 143.6 MB in the beginning and 172.0 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 370.67 ms. Allocated memory is still 188.7 MB. Free memory was 172.0 MB in the beginning and 157.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 49.64 ms. Allocated memory is still 188.7 MB. Free memory was 157.7 MB in the beginning and 156.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 49704.21 ms. Allocated memory was 188.7 MB in the beginning and 283.1 MB in the end (delta: 94.4 MB). Free memory was 156.0 MB in the beginning and 115.1 MB in the end (delta: 41.0 MB). Peak memory consumption was 136.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 49631.8ms, OverallIterations: 13, TraceHistogramMax: 13, EmptinessCheckTime: 30.3ms, AutomataDifference: 30139.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 410 SDtfs, 153 SDslu, 1611 SDs, 0 SdLazy, 1347 SolverSat, 158 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 21132.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 641 GetRequests, 536 SyntacticMatches, 5 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 22406.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=12, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 123.6ms AutomataMinimizationTime, 13 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 132.9ms SsaConstructionTime, 434.3ms SatisfiabilityAnalysisTime, 15847.7ms InterpolantComputationTime, 645 NumberOfCodeBlocks, 594 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 632 ConstructedInterpolants, 0 QuantifiedInterpolants, 2060 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1827 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 1260/1444 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...