/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/hard-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:53:38,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:53:38,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:53:38,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:53:38,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:53:38,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:53:38,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:53:38,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:53:38,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:53:38,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:53:38,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:53:38,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:53:38,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:53:38,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:53:38,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:53:38,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:53:38,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:53:38,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:53:38,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:53:38,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:53:38,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:53:38,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:53:38,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:53:38,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:53:38,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:53:38,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:53:38,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:53:38,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:53:38,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:53:38,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:53:38,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:53:38,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:53:38,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:53:38,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:53:38,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:53:38,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:53:38,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:53:38,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:53:38,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:53:38,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:53:38,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:53:38,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:53:38,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:53:38,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:53:38,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:53:38,509 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:53:38,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:53:38,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:53:38,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:53:38,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:53:38,511 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:53:38,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:53:38,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:53:38,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:53:38,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:53:38,876 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:53:38,878 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:53:38,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2021-05-06 08:53:38,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977d0f6fd/2b610cdaabac4506b24ff3ea2d470443/FLAG63bd28b79 [2021-05-06 08:53:39,326 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:53:39,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2021-05-06 08:53:39,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977d0f6fd/2b610cdaabac4506b24ff3ea2d470443/FLAG63bd28b79 [2021-05-06 08:53:39,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/977d0f6fd/2b610cdaabac4506b24ff3ea2d470443 [2021-05-06 08:53:39,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:53:39,348 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:53:39,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:53:39,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:53:39,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:53:39,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7003954d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39, skipping insertion in model container [2021-05-06 08:53:39,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:53:39,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:53:39,487 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/hard-ll_valuebound5.c[546,559] [2021-05-06 08:53:39,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:53:39,518 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:53:39,583 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/hard-ll_valuebound5.c[546,559] [2021-05-06 08:53:39,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:53:39,613 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:53:39,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39 WrapperNode [2021-05-06 08:53:39,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:53:39,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:53:39,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:53:39,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:53:39,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,650 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (1/1) ... [2021-05-06 08:53:39,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:53:39,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:53:39,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:53:39,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:53:39,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (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 [2021-05-06 08:53:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:53:39,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:53:39,733 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:53:39,733 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:53:39,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:53:39,733 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:53:39,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:53:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:53:39,734 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:53:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:53:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:53:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:53:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:53:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:53:39,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:53:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:53:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:53:39,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:53:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:53:39,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:53:40,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:53:40,034 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:53:40,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:53:40 BoogieIcfgContainer [2021-05-06 08:53:40,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:53:40,036 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:53:40,036 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:53:40,037 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:53:40,039 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:53:40" (1/1) ... [2021-05-06 08:53:40,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:53:40 BasicIcfg [2021-05-06 08:53:40,069 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:53:40,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:53:40,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:53:40,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:53:40,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:53:39" (1/4) ... [2021-05-06 08:53:40,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175d62d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:53:40, skipping insertion in model container [2021-05-06 08:53:40,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:53:39" (2/4) ... [2021-05-06 08:53:40,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175d62d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:53:40, skipping insertion in model container [2021-05-06 08:53:40,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:53:40" (3/4) ... [2021-05-06 08:53:40,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175d62d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:53:40, skipping insertion in model container [2021-05-06 08:53:40,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:53:40" (4/4) ... [2021-05-06 08:53:40,087 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.cJordan [2021-05-06 08:53:40,092 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:53:40,095 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:53:40,110 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:53:40,132 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:53:40,133 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:53:40,133 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:53:40,133 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:53:40,133 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:53:40,133 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:53:40,133 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:53:40,134 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:53:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:53:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:53:40,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:40,158 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:40,159 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 08:53:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:40,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335841862] [2021-05-06 08:53:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:53:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:53:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:53:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:53:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:53:40,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:40,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335841862] [2021-05-06 08:53:40,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335841862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:40,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:40,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:53:40,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073470599] [2021-05-06 08:53:40,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:53:40,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:40,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:53:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:53:40,481 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:53:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:40,632 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:53:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:53:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:53:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:40,640 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:53:40,640 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:53:40,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:53:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:53:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:53:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:53:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 08:53:40,687 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 08:53:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:40,688 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 08:53:40,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:53:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 08:53:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:53:40,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:40,690 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:40,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:53:40,690 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:40,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 08:53:40,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:40,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259934163] [2021-05-06 08:53:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:53:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:53:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:53:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:53:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:53:40,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259934163] [2021-05-06 08:53:40,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259934163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:40,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:40,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:53:40,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441297817] [2021-05-06 08:53:40,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:53:40,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:53:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:53:40,878 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:53:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:41,215 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 08:53:41,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:53:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 08:53:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:41,217 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:53:41,217 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:53:41,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:53:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:53:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:53:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:53:41,239 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 08:53:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:41,240 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:53:41,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:53:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:53:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:53:41,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:41,245 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:41,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:53:41,245 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 08:53:41,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:41,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029157435] [2021-05-06 08:53:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:41,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:53:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:41,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:53:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:41,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:53:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:41,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:53:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:41,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 08:53:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:53:41,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:41,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029157435] [2021-05-06 08:53:41,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029157435] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:41,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:41,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:53:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710881544] [2021-05-06 08:53:41,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:53:41,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:53:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:53:41,366 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:53:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:41,707 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 08:53:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:53:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2021-05-06 08:53:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:41,709 INFO L225 Difference]: With dead ends: 48 [2021-05-06 08:53:41,709 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 08:53:41,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 08:53:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 08:53:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-05-06 08:53:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 08:53:41,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 08:53:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:41,719 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 08:53:41,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:53:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 08:53:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:53:41,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:41,720 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:41,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 08:53:41,720 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 08:53:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:41,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148336203] [2021-05-06 08:53:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:41,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:41,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271876929] [2021-05-06 08:53:41,730 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 [2021-05-06 08:53:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:41,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:53:41,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:41,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:53:41,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:41,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148336203] [2021-05-06 08:53:41,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:41,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271876929] [2021-05-06 08:53:41,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271876929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:53:41,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:53:41,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:53:41,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641601133] [2021-05-06 08:53:41,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:53:41,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:53:41,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:53:41,999 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:53:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:42,060 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2021-05-06 08:53:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:53:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 08:53:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:42,063 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:53:42,063 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:53:42,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:53:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:53:42,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 08:53:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:53:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 08:53:42,073 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 08:53:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:42,073 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 08:53:42,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:53:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 08:53:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:53:42,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:42,077 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:42,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:42,294 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:42,295 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 08:53:42,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:42,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318651647] [2021-05-06 08:53:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:42,305 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:42,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271266247] [2021-05-06 08:53:42,305 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 [2021-05-06 08:53:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:42,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:53:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:42,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 08:53:42,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:42,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318651647] [2021-05-06 08:53:42,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:42,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271266247] [2021-05-06 08:53:42,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271266247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:42,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:42,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:53:42,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597712102] [2021-05-06 08:53:42,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:53:42,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:53:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:53:42,660 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 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) [2021-05-06 08:53:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:42,824 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-05-06 08:53:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:53:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 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 45 [2021-05-06 08:53:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:42,830 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:53:42,830 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:53:42,830 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:53:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:53:42,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:53:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 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) [2021-05-06 08:53:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:53:42,843 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 08:53:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:42,843 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:53:42,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 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) [2021-05-06 08:53:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:53:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:53:42,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:42,847 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:43,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:43,073 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 08:53:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:43,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355765163] [2021-05-06 08:53:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:43,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:43,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718673056] [2021-05-06 08:53:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:53:43,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:43,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 08:53:43,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:43,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355765163] [2021-05-06 08:53:43,383 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:43,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718673056] [2021-05-06 08:53:43,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718673056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:43,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:43,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:53:43,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610671525] [2021-05-06 08:53:43,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:53:43,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:43,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:53:43,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:53:43,386 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:53:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:43,595 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2021-05-06 08:53:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:53:43,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 08:53:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:43,597 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:53:43,597 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 08:53:43,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:53:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 08:53:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 08:53:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:53:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 08:53:43,603 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 08:53:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:43,603 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 08:53:43,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:53:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 08:53:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:53:43,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:43,604 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:43,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:43,809 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1292294975, now seen corresponding path program 1 times [2021-05-06 08:53:43,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:43,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080901255] [2021-05-06 08:53:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:43,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:43,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232021249] [2021-05-06 08:53:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:53:43,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:43,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:43,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 08:53:44,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080901255] [2021-05-06 08:53:44,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:44,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232021249] [2021-05-06 08:53:44,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232021249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:44,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:44,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:53:44,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805385863] [2021-05-06 08:53:44,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:53:44,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:44,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:53:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:44,220 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:53:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:44,466 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-05-06 08:53:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:53:44,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 08:53:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:44,468 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:53:44,468 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 08:53:44,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:53:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 08:53:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 08:53:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:53:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 08:53:44,474 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 08:53:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:44,474 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 08:53:44,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:53:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 08:53:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:53:44,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:44,476 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:44,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:44,689 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash 294687610, now seen corresponding path program 2 times [2021-05-06 08:53:44,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:44,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932316191] [2021-05-06 08:53:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:44,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:44,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72024071] [2021-05-06 08:53:44,698 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 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 [2021-05-06 08:53:44,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:53:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:53:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:44,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 08:53:44,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:44,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932316191] [2021-05-06 08:53:44,992 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:44,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72024071] [2021-05-06 08:53:44,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72024071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:44,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:44,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:53:44,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603689215] [2021-05-06 08:53:44,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:53:44,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:44,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:53:44,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:44,994 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:45,217 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2021-05-06 08:53:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:53:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2021-05-06 08:53:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:45,219 INFO L225 Difference]: With dead ends: 114 [2021-05-06 08:53:45,219 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 08:53:45,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:53:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 08:53:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-06 08:53:45,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:53:45,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-05-06 08:53:45,226 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 72 [2021-05-06 08:53:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:45,226 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-05-06 08:53:45,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-05-06 08:53:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:53:45,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:45,227 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:45,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:45,451 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2021-05-06 08:53:45,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:45,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564613850] [2021-05-06 08:53:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:45,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:45,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528786255] [2021-05-06 08:53:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:53:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:45,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 08:53:45,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:45,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564613850] [2021-05-06 08:53:45,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:45,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528786255] [2021-05-06 08:53:45,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528786255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:45,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:45,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:53:45,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983635855] [2021-05-06 08:53:45,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:53:45,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:53:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:53:45,999 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:46,305 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2021-05-06 08:53:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:53:46,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 08:53:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:46,307 INFO L225 Difference]: With dead ends: 121 [2021-05-06 08:53:46,307 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 08:53:46,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:53:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 08:53:46,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-06 08:53:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 74 states have internal predecessors, (79), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:53:46,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-05-06 08:53:46,325 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 75 [2021-05-06 08:53:46,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:46,325 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-05-06 08:53:46,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:53:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-05-06 08:53:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:53:46,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:46,326 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:46,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:46,541 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:46,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1714864424, now seen corresponding path program 2 times [2021-05-06 08:53:46,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:46,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354522870] [2021-05-06 08:53:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:46,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:46,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703931330] [2021-05-06 08:53:46,553 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 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 [2021-05-06 08:53:46,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:53:46,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:46,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:53:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:46,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:46,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:47,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:47,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:47,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:47,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:47,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:47,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 08:53:47,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354522870] [2021-05-06 08:53:47,202 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703931330] [2021-05-06 08:53:47,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703931330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:47,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:47,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:53:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233654096] [2021-05-06 08:53:47,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:53:47,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:47,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:53:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:53:47,206 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:53:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:47,659 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2021-05-06 08:53:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:53:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-06 08:53:47,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:47,662 INFO L225 Difference]: With dead ends: 141 [2021-05-06 08:53:47,662 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:53:47,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:53:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:53:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-06 08:53:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:53:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-05-06 08:53:47,673 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 79 [2021-05-06 08:53:47,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:47,673 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-05-06 08:53:47,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:53:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-05-06 08:53:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:53:47,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:47,675 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:47,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:53:47,898 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:47,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2021-05-06 08:53:47,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:47,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183045728] [2021-05-06 08:53:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:47,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:47,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577947360] [2021-05-06 08:53:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:53:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:53:47,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:48,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 08:53:48,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183045728] [2021-05-06 08:53:48,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577947360] [2021-05-06 08:53:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577947360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:48,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:48,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:53:48,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923393500] [2021-05-06 08:53:48,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:53:48,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:53:48,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:53:48,137 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:53:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:48,233 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-05-06 08:53:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:53:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 08:53:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:48,234 INFO L225 Difference]: With dead ends: 158 [2021-05-06 08:53:48,235 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 08:53:48,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:53:48,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 08:53:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-05-06 08:53:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:53:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-06 08:53:48,252 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 86 [2021-05-06 08:53:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:48,253 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-06 08:53:48,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:53:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-06 08:53:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:53:48,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:48,254 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:48,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:53:48,473 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:48,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1101138899, now seen corresponding path program 3 times [2021-05-06 08:53:48,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:48,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74269815] [2021-05-06 08:53:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:48,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:48,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936330293] [2021-05-06 08:53:48,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:48,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:53:48,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:48,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:53:48,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:48,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:48,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-05-06 08:53:48,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74269815] [2021-05-06 08:53:48,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:48,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936330293] [2021-05-06 08:53:48,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936330293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:48,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:48,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:53:48,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877805038] [2021-05-06 08:53:48,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:53:48,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:48,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:53:48,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:53:48,816 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:53:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:49,130 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2021-05-06 08:53:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:53:49,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-05-06 08:53:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:49,132 INFO L225 Difference]: With dead ends: 151 [2021-05-06 08:53:49,132 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 08:53:49,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:53:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 08:53:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 08:53:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 96 states have internal predecessors, (101), 42 states have call successors, (42), 19 states have call predecessors, (42), 18 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-06 08:53:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2021-05-06 08:53:49,138 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 89 [2021-05-06 08:53:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:49,138 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2021-05-06 08:53:49,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 08:53:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2021-05-06 08:53:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:53:49,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:49,140 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:49,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:49,340 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:49,341 INFO L82 PathProgramCache]: Analyzing trace with hash 632527946, now seen corresponding path program 2 times [2021-05-06 08:53:49,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:49,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452642147] [2021-05-06 08:53:49,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:49,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:49,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730933175] [2021-05-06 08:53:49,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:49,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:53:49,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:49,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:53:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:49,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-06 08:53:49,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:49,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452642147] [2021-05-06 08:53:49,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:49,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730933175] [2021-05-06 08:53:49,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730933175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:49,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:49,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:53:49,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001598394] [2021-05-06 08:53:49,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:53:49,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:49,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:53:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:53:49,921 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:53:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:50,243 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-05-06 08:53:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:53:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-06 08:53:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:50,244 INFO L225 Difference]: With dead ends: 157 [2021-05-06 08:53:50,244 INFO L226 Difference]: Without dead ends: 157 [2021-05-06 08:53:50,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:53:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-06 08:53:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-05-06 08:53:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 93 states have (on average 1.10752688172043) internal successors, (103), 99 states have internal predecessors, (103), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:53:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 180 transitions. [2021-05-06 08:53:50,251 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 180 transitions. Word has length 92 [2021-05-06 08:53:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:50,251 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 180 transitions. [2021-05-06 08:53:50,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 08:53:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 180 transitions. [2021-05-06 08:53:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:53:50,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:50,252 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:50,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:50,475 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash -317970408, now seen corresponding path program 3 times [2021-05-06 08:53:50,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:50,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176300366] [2021-05-06 08:53:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:50,482 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:50,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232107893] [2021-05-06 08:53:50,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:50,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:53:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:53:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:50,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:50,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-05-06 08:53:51,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:51,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176300366] [2021-05-06 08:53:51,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:51,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232107893] [2021-05-06 08:53:51,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232107893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:51,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:51,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:53:51,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315651908] [2021-05-06 08:53:51,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:53:51,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:51,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:53:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:53:51,083 INFO L87 Difference]: Start difference. First operand 154 states and 180 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:53:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:51,609 INFO L93 Difference]: Finished difference Result 165 states and 190 transitions. [2021-05-06 08:53:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:53:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 08:53:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:51,610 INFO L225 Difference]: With dead ends: 165 [2021-05-06 08:53:51,610 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:53:51,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:53:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:53:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-05-06 08:53:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 100 states have internal predecessors, (104), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 08:53:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2021-05-06 08:53:51,616 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 105 [2021-05-06 08:53:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:51,616 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2021-05-06 08:53:51,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:53:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2021-05-06 08:53:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 08:53:51,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:51,617 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:51,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:53:51,829 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1215926749, now seen corresponding path program 4 times [2021-05-06 08:53:51,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:51,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417437792] [2021-05-06 08:53:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:51,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:51,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226794950] [2021-05-06 08:53:51,836 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:51,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:53:51,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:51,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:53:51,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:51,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:51,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-06 08:53:52,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:53:52,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417437792] [2021-05-06 08:53:52,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:53:52,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226794950] [2021-05-06 08:53:52,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226794950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:53:52,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:53:52,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:53:52,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470998355] [2021-05-06 08:53:52,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:53:52,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:53:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:53:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:53:52,410 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:53:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:53:52,834 INFO L93 Difference]: Finished difference Result 198 states and 231 transitions. [2021-05-06 08:53:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:53:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 109 [2021-05-06 08:53:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:53:52,836 INFO L225 Difference]: With dead ends: 198 [2021-05-06 08:53:52,836 INFO L226 Difference]: Without dead ends: 198 [2021-05-06 08:53:52,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:53:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-06 08:53:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2021-05-06 08:53:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 120 states have (on average 1.1083333333333334) internal successors, (133), 125 states have internal predecessors, (133), 48 states have call successors, (48), 27 states have call predecessors, (48), 26 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:53:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 226 transitions. [2021-05-06 08:53:52,845 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 226 transitions. Word has length 109 [2021-05-06 08:53:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:53:52,845 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 226 transitions. [2021-05-06 08:53:52,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:53:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 226 transitions. [2021-05-06 08:53:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:53:52,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:53:52,846 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:53:53,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:53:53,065 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:53:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:53:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2021-05-06 08:53:53,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:53:53,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96040987] [2021-05-06 08:53:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:53:53,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:53:53,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049152493] [2021-05-06 08:53:53,100 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:53:53,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:53:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:53:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:53:53,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:53:53,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:53,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:54,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:54,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:54,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:54,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:53:54,078 WARN L159 QuantifierPusher]: Ignoring assumption.