/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/egcd-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:12:11,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:12:11,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:12:11,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:12:11,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:12:11,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:12:11,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:12:11,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:12:11,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:12:11,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:12:11,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:12:11,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:12:11,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:12:11,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:12:11,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:12:11,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:12:11,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:12:11,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:12:11,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:12:11,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:12:11,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:12:11,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:12:11,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:12:11,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:12:11,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:12:11,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:12:11,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:12:11,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:12:11,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:12:11,537 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:12:11,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:12:11,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:12:11,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:12:11,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:12:11,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:12:11,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:12:11,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:12:11,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:12:11,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:12:11,542 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:12:11,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:12:11,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:12:11,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:12:11,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:12:11,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:12:11,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:12:11,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:12:11,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:12:11,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:12:11,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:12:11,545 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:12:11,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:12:11,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:12:11,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:12:11,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:12:11,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:12:11,882 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:12:11,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-05-06 08:12:11,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cab8d364/726bc80c8caa495a8d20f1d87c4e5348/FLAGa834d4b57 [2021-05-06 08:12:12,404 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:12:12,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-05-06 08:12:12,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cab8d364/726bc80c8caa495a8d20f1d87c4e5348/FLAGa834d4b57 [2021-05-06 08:12:12,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cab8d364/726bc80c8caa495a8d20f1d87c4e5348 [2021-05-06 08:12:12,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:12:12,432 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:12:12,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:12,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:12:12,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:12:12,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17abd13f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12, skipping insertion in model container [2021-05-06 08:12:12,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:12:12,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:12:12,583 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/egcd-ll_valuebound100.c[489,502] [2021-05-06 08:12:12,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:12,622 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:12:12,681 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/egcd-ll_valuebound100.c[489,502] [2021-05-06 08:12:12,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:12:12,705 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:12:12,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12 WrapperNode [2021-05-06 08:12:12,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:12:12,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:12:12,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:12:12,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:12:12,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (1/1) ... [2021-05-06 08:12:12,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:12:12,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:12:12,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:12:12,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:12:12,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (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 08:12:12,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:12:12,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:12:12,841 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:12:12,842 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:12:12,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:12:12,842 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:12:12,842 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:12:12,842 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:12:12,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:12:12,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:12:12,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:12:12,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:12:12,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:12:12,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:12:12,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:12:12,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:12:12,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:12:12,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:12:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:12:12,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:12:13,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:12:13,166 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:12:13,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:13 BoogieIcfgContainer [2021-05-06 08:12:13,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:12:13,168 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:12:13,168 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:12:13,169 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:12:13,171 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:13" (1/1) ... [2021-05-06 08:12:13,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:13 BasicIcfg [2021-05-06 08:12:13,195 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:12:13,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:12:13,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:12:13,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:12:13,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:12:12" (1/4) ... [2021-05-06 08:12:13,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741ea39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:13, skipping insertion in model container [2021-05-06 08:12:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:12:12" (2/4) ... [2021-05-06 08:12:13,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741ea39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:12:13, skipping insertion in model container [2021-05-06 08:12:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:12:13" (3/4) ... [2021-05-06 08:12:13,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741ea39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:12:13, skipping insertion in model container [2021-05-06 08:12:13,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:12:13" (4/4) ... [2021-05-06 08:12:13,202 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound100.cJordan [2021-05-06 08:12:13,207 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:12:13,210 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:12:13,224 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:12:13,241 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:12:13,241 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:12:13,241 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:12:13,241 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:12:13,241 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:12:13,241 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:12:13,241 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:12:13,242 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:12:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:12:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:13,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:13,265 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:13,266 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-06 08:12:13,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:13,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791391305] [2021-05-06 08:12:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:12:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:13,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:12:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:13,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:12:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:13,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:12:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:13,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:12:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:13,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791391305] [2021-05-06 08:12:13,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791391305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:13,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:13,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:12:13,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406959238] [2021-05-06 08:12:13,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:12:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:13,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:12:13,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:13,567 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:13,818 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-06 08:12:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:12:13,820 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:12:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:13,827 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:12:13,827 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:12:13,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:12:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:12:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:12:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:12:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:12:13,859 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 08:12:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:13,859 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:12:13,859 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:12:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:12:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:12:13,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:13,861 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:13,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:12:13,861 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:13,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-06 08:12:13,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:13,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678224148] [2021-05-06 08:12:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:13,895 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:13,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680028496] [2021-05-06 08:12:13,896 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 08:12:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:14,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:12:14,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:12:14,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678224148] [2021-05-06 08:12:14,177 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680028496] [2021-05-06 08:12:14,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680028496] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:14,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:14,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:14,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066226383] [2021-05-06 08:12:14,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:14,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:14,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:14,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:14,180 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:12:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:14,253 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-06 08:12:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 08:12:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:14,255 INFO L225 Difference]: With dead ends: 46 [2021-05-06 08:12:14,256 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 08:12:14,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 08:12:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 08:12:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:12:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 08:12:14,275 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 08:12:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:14,275 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 08:12:14,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:12:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 08:12:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:12:14,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:14,277 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:14,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:12:14,498 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:14,499 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-06 08:12:14,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:14,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875918603] [2021-05-06 08:12:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:14,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:14,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917428632] [2021-05-06 08:12:14,512 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 08:12:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:14,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:12:14,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:14,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875918603] [2021-05-06 08:12:14,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:14,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917428632] [2021-05-06 08:12:14,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917428632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:14,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:14,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:14,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344290175] [2021-05-06 08:12:14,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:14,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:14,843 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:12:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:15,008 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-06 08:12:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:15,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 08:12:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:15,020 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:15,020 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:15,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 08:12:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:12:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 08:12:15,048 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 08:12:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:15,049 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 08:12:15,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:12:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 08:12:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:12:15,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:15,050 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:15,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:15,251 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:15,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:15,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-06 08:12:15,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:15,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640273516] [2021-05-06 08:12:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:15,272 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:15,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343573504] [2021-05-06 08:12:15,272 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 08:12:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:15,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:15,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:12:15,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:15,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640273516] [2021-05-06 08:12:15,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:15,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343573504] [2021-05-06 08:12:15,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343573504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:15,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:15,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:15,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021358705] [2021-05-06 08:12:15,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:15,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:15,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:15,565 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:12:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:15,730 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-06 08:12:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:15,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-06 08:12:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:15,733 INFO L225 Difference]: With dead ends: 66 [2021-05-06 08:12:15,733 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:12:15,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:15,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:12:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 08:12:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 08:12:15,753 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 08:12:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:15,758 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 08:12:15,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:12:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 08:12:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:12:15,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:15,762 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1] [2021-05-06 08:12:15,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:15,985 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-06 08:12:15,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:15,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148359343] [2021-05-06 08:12:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:16,005 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:16,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209614931] [2021-05-06 08:12:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:12:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:16,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:12:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:16,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:12:16,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:16,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148359343] [2021-05-06 08:12:16,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:16,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209614931] [2021-05-06 08:12:16,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209614931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:16,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:16,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:16,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301519348] [2021-05-06 08:12:16,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:16,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:16,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:16,160 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:16,195 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-06 08:12:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 08:12:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:16,201 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:12:16,201 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:12:16,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:12:16,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 08:12:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:12:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 08:12:16,207 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 08:12:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:16,208 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 08:12:16,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 08:12:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 08:12:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:12:16,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:16,209 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:16,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:16,424 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-06 08:12:16,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:16,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30377951] [2021-05-06 08:12:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:16,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:16,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293387207] [2021-05-06 08:12:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:16,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:12:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:16,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 08:12:16,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:16,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30377951] [2021-05-06 08:12:16,634 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:16,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293387207] [2021-05-06 08:12:16,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293387207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:12:16,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:12:16,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:12:16,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560823765] [2021-05-06 08:12:16,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:12:16,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:16,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:12:16,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:12:16,637 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:12:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:16,682 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 08:12:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:12:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 08:12:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:16,683 INFO L225 Difference]: With dead ends: 82 [2021-05-06 08:12:16,683 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:12:16,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:12:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 08:12:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:12:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 08:12:16,693 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 08:12:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:16,694 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 08:12:16,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:12:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 08:12:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:12:16,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:16,695 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:16,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:12:16,905 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-06 08:12:16,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:16,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162744972] [2021-05-06 08:12:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:16,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:16,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11092544] [2021-05-06 08:12:16,920 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 08:12:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:17,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:12:17,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:17,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:17,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:17,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:12:17,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:17,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162744972] [2021-05-06 08:12:17,163 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:17,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11092544] [2021-05-06 08:12:17,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11092544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:17,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:17,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:17,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384702805] [2021-05-06 08:12:17,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:17,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:17,165 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:17,301 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-06 08:12:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:17,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 08:12:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:17,304 INFO L225 Difference]: With dead ends: 86 [2021-05-06 08:12:17,304 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:12:17,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:12:17,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 08:12:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:12:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 08:12:17,324 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 08:12:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:17,325 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 08:12:17,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 08:12:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:12:17,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:17,330 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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 08:12:17,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:17,556 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-06 08:12:17,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:17,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997844992] [2021-05-06 08:12:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:17,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:17,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666218778] [2021-05-06 08:12:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:17,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:17,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:17,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:12:17,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:17,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997844992] [2021-05-06 08:12:17,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:17,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666218778] [2021-05-06 08:12:17,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666218778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:17,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:17,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:12:17,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056383132] [2021-05-06 08:12:17,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:12:17,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:17,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:12:17,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:17,818 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:17,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:17,913 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-06 08:12:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:12:17,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-05-06 08:12:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:17,915 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:12:17,915 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:12:17,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:12:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 08:12:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:12:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 08:12:17,930 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 08:12:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:17,930 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 08:12:17,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:12:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 08:12:17,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:12:17,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:17,931 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2021-05-06 08:12:18,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:18,132 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-06 08:12:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:18,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465782887] [2021-05-06 08:12:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:18,144 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:18,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435872378] [2021-05-06 08:12:18,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:12:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:18,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 08:12:18,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:18,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465782887] [2021-05-06 08:12:18,440 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:18,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435872378] [2021-05-06 08:12:18,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435872378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:18,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:18,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:18,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757634679] [2021-05-06 08:12:18,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:18,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:18,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:18,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:18,442 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 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 08:12:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:18,616 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-06 08:12:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 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 61 [2021-05-06 08:12:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:18,620 INFO L225 Difference]: With dead ends: 135 [2021-05-06 08:12:18,620 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 08:12:18,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 08:12:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 08:12:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:12:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 08:12:18,632 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 08:12:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:18,632 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 08:12:18,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 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 08:12:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 08:12:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:12:18,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:18,634 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2021-05-06 08:12:18,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:12:18,845 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:18,846 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-06 08:12:18,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:18,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327220080] [2021-05-06 08:12:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:18,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:18,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016206751] [2021-05-06 08:12:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:12:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:18,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:19,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 08:12:19,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:19,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327220080] [2021-05-06 08:12:19,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:19,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016206751] [2021-05-06 08:12:19,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016206751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:19,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:19,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:19,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245696779] [2021-05-06 08:12:19,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:19,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:19,119 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 08:12:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:19,219 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-05-06 08:12:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:19,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 69 [2021-05-06 08:12:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:19,222 INFO L225 Difference]: With dead ends: 149 [2021-05-06 08:12:19,222 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 08:12:19,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 08:12:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-06 08:12:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:12:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-06 08:12:19,230 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-06 08:12:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:19,231 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-06 08:12:19,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 08:12:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-06 08:12:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:12:19,232 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:19,232 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2021-05-06 08:12:19,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:19,457 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:19,457 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-06 08:12:19,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:19,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793080509] [2021-05-06 08:12:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:19,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:19,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544619958] [2021-05-06 08:12:19,471 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 08:12:19,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:19,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:19,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:12:19,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:19,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 08:12:19,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:19,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793080509] [2021-05-06 08:12:19,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:19,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544619958] [2021-05-06 08:12:19,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544619958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:19,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:19,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:19,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98929842] [2021-05-06 08:12:19,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:19,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:19,736 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 08:12:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:19,829 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-06 08:12:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:19,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 69 [2021-05-06 08:12:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:19,832 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:12:19,833 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 08:12:19,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 08:12:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-06 08:12:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-06 08:12:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 08:12:19,844 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-06 08:12:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:19,844 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 08:12:19,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 08:12:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 08:12:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:12:19,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:19,846 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 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 08:12:20,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:20,074 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:20,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-06 08:12:20,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:20,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909729179] [2021-05-06 08:12:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:20,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:20,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695314957] [2021-05-06 08:12:20,083 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 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 08:12:20,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:20,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:20,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:12:20,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:20,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 08:12:20,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:20,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909729179] [2021-05-06 08:12:20,651 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:20,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695314957] [2021-05-06 08:12:20,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695314957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:20,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:20,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:12:20,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609434858] [2021-05-06 08:12:20,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:12:20,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:12:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:20,654 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:21,420 INFO L93 Difference]: Finished difference Result 188 states and 239 transitions. [2021-05-06 08:12:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:12:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 08:12:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:21,422 INFO L225 Difference]: With dead ends: 188 [2021-05-06 08:12:21,422 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 08:12:21,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:12:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 08:12:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-06 08:12:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 08:12:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 08:12:21,429 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-06 08:12:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:21,429 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 08:12:21,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:12:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 08:12:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:12:21,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:21,431 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:12:21,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:12:21,641 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1927051720, now seen corresponding path program 3 times [2021-05-06 08:12:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:21,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888118298] [2021-05-06 08:12:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:21,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:21,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553370499] [2021-05-06 08:12:21,655 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 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 08:12:21,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:21,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:21,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:12:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:21,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:21,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:22,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:22,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:22,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:22,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:22,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-06 08:12:22,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:22,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888118298] [2021-05-06 08:12:22,167 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:22,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553370499] [2021-05-06 08:12:22,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553370499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:22,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:22,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:22,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577506495] [2021-05-06 08:12:22,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:22,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:22,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:22,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:22,169 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 08:12:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:22,802 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-05-06 08:12:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 74 [2021-05-06 08:12:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:22,805 INFO L225 Difference]: With dead ends: 211 [2021-05-06 08:12:22,805 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:12:22,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:12:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-06 08:12:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 08:12:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-06 08:12:22,814 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-06 08:12:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:22,815 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-06 08:12:22,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 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 08:12:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-06 08:12:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:12:22,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:22,817 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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] [2021-05-06 08:12:23,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:12:23,037 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:23,037 INFO L82 PathProgramCache]: Analyzing trace with hash 504849037, now seen corresponding path program 4 times [2021-05-06 08:12:23,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:23,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318711810] [2021-05-06 08:12:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:23,045 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:23,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350811415] [2021-05-06 08:12:23,046 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 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 08:12:23,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:23,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:12:23,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-06 08:12:23,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:23,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318711810] [2021-05-06 08:12:23,414 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:23,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350811415] [2021-05-06 08:12:23,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350811415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:23,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:23,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280128524] [2021-05-06 08:12:23,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:23,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:23,415 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:23,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:23,949 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2021-05-06 08:12:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:23,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 08:12:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:23,951 INFO L225 Difference]: With dead ends: 217 [2021-05-06 08:12:23,951 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 08:12:23,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 08:12:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-06 08:12:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:12:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-06 08:12:23,957 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-06 08:12:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:23,957 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-06 08:12:23,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-06 08:12:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:12:23,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:23,959 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 08:12:24,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:12:24,185 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-06 08:12:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:24,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842977423] [2021-05-06 08:12:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:24,193 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:24,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786538219] [2021-05-06 08:12:24,193 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:24,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:12:24,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:24,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:12:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:24,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:24,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:24,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 08:12:24,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:24,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842977423] [2021-05-06 08:12:24,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:24,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786538219] [2021-05-06 08:12:24,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786538219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:24,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:24,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:24,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036962984] [2021-05-06 08:12:24,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:24,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:24,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:24,483 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:29,764 INFO L93 Difference]: Finished difference Result 198 states and 249 transitions. [2021-05-06 08:12:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:12:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 08:12:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:29,766 INFO L225 Difference]: With dead ends: 198 [2021-05-06 08:12:29,766 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 08:12:29,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:12:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 08:12:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-05-06 08:12:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 54 states have call successors, (54), 25 states have call predecessors, (54), 24 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:12:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2021-05-06 08:12:29,776 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 79 [2021-05-06 08:12:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:29,776 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2021-05-06 08:12:29,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:12:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2021-05-06 08:12:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:29,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:29,777 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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 08:12:30,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:30,003 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1037601673, now seen corresponding path program 5 times [2021-05-06 08:12:30,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:30,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310178352] [2021-05-06 08:12:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:30,018 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:30,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494171568] [2021-05-06 08:12:30,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:30,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:12:30,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:12:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 08:12:30,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:30,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310178352] [2021-05-06 08:12:30,270 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:30,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494171568] [2021-05-06 08:12:30,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494171568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:30,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:30,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:12:30,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016875919] [2021-05-06 08:12:30,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:12:30,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:30,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:12:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:12:30,272 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:12:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:30,344 INFO L93 Difference]: Finished difference Result 221 states and 280 transitions. [2021-05-06 08:12:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:12:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2021-05-06 08:12:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:30,346 INFO L225 Difference]: With dead ends: 221 [2021-05-06 08:12:30,346 INFO L226 Difference]: Without dead ends: 221 [2021-05-06 08:12:30,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-06 08:12:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2021-05-06 08:12:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 124 states have internal predecessors, (139), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 08:12:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 262 transitions. [2021-05-06 08:12:30,356 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 262 transitions. Word has length 87 [2021-05-06 08:12:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:30,357 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 262 transitions. [2021-05-06 08:12:30,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:12:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 262 transitions. [2021-05-06 08:12:30,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:30,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:30,358 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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 08:12:30,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:12:30,579 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:30,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1133237577, now seen corresponding path program 6 times [2021-05-06 08:12:30,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:30,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716466799] [2021-05-06 08:12:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:30,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:30,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887860625] [2021-05-06 08:12:30,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:30,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 08:12:30,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:30,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:30,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:30,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:30,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716466799] [2021-05-06 08:12:30,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:30,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887860625] [2021-05-06 08:12:30,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887860625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:30,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:30,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:30,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406034655] [2021-05-06 08:12:30,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:30,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:30,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:30,872 INFO L87 Difference]: Start difference. First operand 208 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:12:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:31,019 INFO L93 Difference]: Finished difference Result 231 states and 294 transitions. [2021-05-06 08:12:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:31,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 08:12:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:31,020 INFO L225 Difference]: With dead ends: 231 [2021-05-06 08:12:31,021 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 08:12:31,021 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:31,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 08:12:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 08:12:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 69 states have call successors, (69), 28 states have call predecessors, (69), 27 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-06 08:12:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2021-05-06 08:12:31,028 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 87 [2021-05-06 08:12:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:31,029 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2021-05-06 08:12:31,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:12:31,029 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2021-05-06 08:12:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:31,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:31,030 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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 08:12:31,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:12:31,245 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1104608426, now seen corresponding path program 7 times [2021-05-06 08:12:31,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:31,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078621233] [2021-05-06 08:12:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:31,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:31,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775787772] [2021-05-06 08:12:31,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:31,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:31,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:31,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078621233] [2021-05-06 08:12:31,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:31,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775787772] [2021-05-06 08:12:31,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775787772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:31,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:31,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:31,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719143437] [2021-05-06 08:12:31,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:31,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:31,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:31,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:31,504 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:12:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:31,844 INFO L93 Difference]: Finished difference Result 241 states and 307 transitions. [2021-05-06 08:12:31,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:31,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 08:12:31,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:31,847 INFO L225 Difference]: With dead ends: 241 [2021-05-06 08:12:31,847 INFO L226 Difference]: Without dead ends: 241 [2021-05-06 08:12:31,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-06 08:12:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-05-06 08:12:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:12:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 08:12:31,855 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 08:12:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:31,856 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 08:12:31,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:12:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 08:12:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:31,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:31,857 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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 08:12:32,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:12:32,058 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash -942157577, now seen corresponding path program 8 times [2021-05-06 08:12:32,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:32,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962795469] [2021-05-06 08:12:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:32,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:32,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721972993] [2021-05-06 08:12:32,065 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:32,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:32,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:12:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:32,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:32,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:32,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962795469] [2021-05-06 08:12:32,327 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:32,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721972993] [2021-05-06 08:12:32,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721972993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:32,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:32,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:12:32,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486219475] [2021-05-06 08:12:32,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:12:32,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:12:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:12:32,329 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:12:32,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:32,471 INFO L93 Difference]: Finished difference Result 252 states and 323 transitions. [2021-05-06 08:12:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:32,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 08:12:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:32,473 INFO L225 Difference]: With dead ends: 252 [2021-05-06 08:12:32,473 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 08:12:32,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 08:12:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-05-06 08:12:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:12:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 08:12:32,480 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 08:12:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:32,481 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 08:12:32,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 08:12:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 08:12:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:12:32,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:32,482 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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 08:12:32,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:32,701 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:32,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:32,701 INFO L82 PathProgramCache]: Analyzing trace with hash -913528426, now seen corresponding path program 9 times [2021-05-06 08:12:32,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:32,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353092573] [2021-05-06 08:12:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:32,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:32,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571139126] [2021-05-06 08:12:32,708 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:32,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:32,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:32,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:12:32,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:32,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 49 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 08:12:32,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:32,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353092573] [2021-05-06 08:12:32,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:32,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571139126] [2021-05-06 08:12:32,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571139126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:32,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:32,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:12:32,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206054765] [2021-05-06 08:12:32,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:12:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:12:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:12:32,934 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:12:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:33,006 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2021-05-06 08:12:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:12:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-05-06 08:12:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:33,008 INFO L225 Difference]: With dead ends: 243 [2021-05-06 08:12:33,008 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 08:12:33,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 08:12:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-05-06 08:12:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 137 states have (on average 1.145985401459854) internal successors, (157), 143 states have internal predecessors, (157), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 08:12:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 295 transitions. [2021-05-06 08:12:33,017 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 295 transitions. Word has length 87 [2021-05-06 08:12:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:33,017 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 295 transitions. [2021-05-06 08:12:33,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:12:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 295 transitions. [2021-05-06 08:12:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:33,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:33,019 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 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, 1, 1] [2021-05-06 08:12:33,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:33,242 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:33,243 INFO L82 PathProgramCache]: Analyzing trace with hash -428683728, now seen corresponding path program 3 times [2021-05-06 08:12:33,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:33,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904392988] [2021-05-06 08:12:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:33,249 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:33,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64952275] [2021-05-06 08:12:33,249 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:33,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:12:33,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:12:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:33,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:12:33,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:33,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904392988] [2021-05-06 08:12:33,533 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:33,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64952275] [2021-05-06 08:12:33,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64952275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:33,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:33,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:12:33,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391338418] [2021-05-06 08:12:33,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:12:33,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:33,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:12:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:33,534 INFO L87 Difference]: Start difference. First operand 237 states and 295 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:33,783 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2021-05-06 08:12:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:12:33,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 92 [2021-05-06 08:12:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:33,785 INFO L225 Difference]: With dead ends: 269 [2021-05-06 08:12:33,785 INFO L226 Difference]: Without dead ends: 269 [2021-05-06 08:12:33,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-06 08:12:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-05-06 08:12:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1397058823529411) internal successors, (155), 141 states have internal predecessors, (155), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 08:12:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-06 08:12:33,793 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 92 [2021-05-06 08:12:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:33,794 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-06 08:12:33,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:12:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-06 08:12:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:33,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:33,795 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 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 08:12:33,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:12:33,996 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash 264417969, now seen corresponding path program 10 times [2021-05-06 08:12:33,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:33,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156576727] [2021-05-06 08:12:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:34,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:34,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905214668] [2021-05-06 08:12:34,002 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:34,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:12:34,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:34,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:12:34,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:34,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 56 proven. 54 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-06 08:12:34,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156576727] [2021-05-06 08:12:34,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905214668] [2021-05-06 08:12:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905214668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:34,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:34,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189173722] [2021-05-06 08:12:34,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:34,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:34,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:34,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:34,529 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 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 08:12:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:35,097 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 08:12:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 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 08:12:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:35,099 INFO L225 Difference]: With dead ends: 256 [2021-05-06 08:12:35,099 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 08:12:35,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 08:12:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-05-06 08:12:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 150 states have internal predecessors, (165), 64 states have call successors, (64), 33 states have call predecessors, (64), 32 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:12:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2021-05-06 08:12:35,106 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 92 [2021-05-06 08:12:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:35,106 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2021-05-06 08:12:35,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 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 08:12:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2021-05-06 08:12:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:35,108 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:35,108 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 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 08:12:35,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 08:12:35,308 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:35,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:35,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1542255729, now seen corresponding path program 11 times [2021-05-06 08:12:35,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:35,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350954841] [2021-05-06 08:12:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:35,317 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:35,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640764550] [2021-05-06 08:12:35,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:36,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:12:36,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 08:12:36,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:36,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 08:12:36,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:36,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350954841] [2021-05-06 08:12:36,410 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:36,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640764550] [2021-05-06 08:12:36,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640764550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:36,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:36,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:12:36,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760213507] [2021-05-06 08:12:36,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:12:36,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:12:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:12:36,411 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:12:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:36,821 INFO L93 Difference]: Finished difference Result 268 states and 325 transitions. [2021-05-06 08:12:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:12:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 08:12:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:36,823 INFO L225 Difference]: With dead ends: 268 [2021-05-06 08:12:36,823 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 08:12:36,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:12:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 08:12:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2021-05-06 08:12:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 151 states have internal predecessors, (167), 63 states have call successors, (63), 34 states have call predecessors, (63), 33 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:12:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2021-05-06 08:12:36,831 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 92 [2021-05-06 08:12:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:36,831 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2021-05-06 08:12:36,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:12:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2021-05-06 08:12:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:12:36,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:36,832 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 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 08:12:37,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:37,040 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:37,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 12 times [2021-05-06 08:12:37,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:37,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133039621] [2021-05-06 08:12:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:37,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:37,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147486100] [2021-05-06 08:12:37,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:37,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:12:37,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:37,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:12:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:37,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-05-06 08:12:37,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133039621] [2021-05-06 08:12:37,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147486100] [2021-05-06 08:12:37,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147486100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:37,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:37,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:12:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447952743] [2021-05-06 08:12:38,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:12:38,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:12:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:12:38,001 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:38,954 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2021-05-06 08:12:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:12:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-05-06 08:12:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:38,957 INFO L225 Difference]: With dead ends: 315 [2021-05-06 08:12:38,957 INFO L226 Difference]: Without dead ends: 311 [2021-05-06 08:12:38,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:12:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-06 08:12:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2021-05-06 08:12:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 36 states have call predecessors, (65), 35 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:12:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 300 transitions. [2021-05-06 08:12:38,964 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 300 transitions. Word has length 92 [2021-05-06 08:12:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:38,964 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 300 transitions. [2021-05-06 08:12:38,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:12:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 300 transitions. [2021-05-06 08:12:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:12:38,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:38,965 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 08:12:39,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:12:39,166 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1250826676, now seen corresponding path program 13 times [2021-05-06 08:12:39,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:39,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517733751] [2021-05-06 08:12:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:39,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:39,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916626306] [2021-05-06 08:12:39,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:12:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 08:12:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:39,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 59 proven. 47 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 08:12:39,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:12:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517733751] [2021-05-06 08:12:39,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:12:39,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916626306] [2021-05-06 08:12:39,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916626306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:12:39,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:12:39,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:12:39,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21965218] [2021-05-06 08:12:39,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:12:39,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:12:39,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:12:39,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:12:39,527 INFO L87 Difference]: Start difference. First operand 254 states and 300 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:12:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:12:39,898 INFO L93 Difference]: Finished difference Result 304 states and 364 transitions. [2021-05-06 08:12:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:12:39,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2021-05-06 08:12:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:12:39,900 INFO L225 Difference]: With dead ends: 304 [2021-05-06 08:12:39,900 INFO L226 Difference]: Without dead ends: 296 [2021-05-06 08:12:39,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:12:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-06 08:12:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-05-06 08:12:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 180 states have (on average 1.1222222222222222) internal successors, (202), 185 states have internal predecessors, (202), 74 states have call successors, (74), 42 states have call predecessors, (74), 41 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:12:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-05-06 08:12:39,908 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 97 [2021-05-06 08:12:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:12:39,909 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-05-06 08:12:39,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:12:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-05-06 08:12:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:12:39,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:12:39,910 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 08:12:40,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,125 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:12:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:12:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2018648621, now seen corresponding path program 14 times [2021-05-06 08:12:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:12:40,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917846798] [2021-05-06 08:12:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:12:40,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:12:40,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169383488] [2021-05-06 08:12:40,135 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:12:40,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:12:40,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:12:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 08:12:40,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:12:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:40,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:41,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:42,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:57,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:12:59,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:00,022 WARN L159 QuantifierPusher]: Ignoring assumption.