/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/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:17:00,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:17:00,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:17:00,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:17:00,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:17:00,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:17:00,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:17:01,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:17:01,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:17:01,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:17:01,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:17:01,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:17:01,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:17:01,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:17:01,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:17:01,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:17:01,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:17:01,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:17:01,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:17:01,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:17:01,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:17:01,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:17:01,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:17:01,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:17:01,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:17:01,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:17:01,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:17:01,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:17:01,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:17:01,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:17:01,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:17:01,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:17:01,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:17:01,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:17:01,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:17:01,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:17:01,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:17:01,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:17:01,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:17:01,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:17:01,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:17:01,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:17:01,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:17:01,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:17:01,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:17:01,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:17:01,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:17:01,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:17:01,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:17:01,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:17:01,068 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:17:01,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:17:01,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:17:01,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:17:01,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:17:01,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:17:01,311 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:17:01,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2021-05-06 07:17:01,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7780c3914/be79b768cc4d48ce847921d1002ad7bf/FLAG11d52ade9 [2021-05-06 07:17:01,659 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:17:01,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2021-05-06 07:17:01,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7780c3914/be79b768cc4d48ce847921d1002ad7bf/FLAG11d52ade9 [2021-05-06 07:17:02,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7780c3914/be79b768cc4d48ce847921d1002ad7bf [2021-05-06 07:17:02,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:17:02,084 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:17:02,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:17:02,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:17:02,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:17:02,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3596311e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02, skipping insertion in model container [2021-05-06 07:17:02,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:17:02,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:17:02,210 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/cohencu-ll_valuebound50.c[596,609] [2021-05-06 07:17:02,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:17:02,226 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:17:02,233 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/cohencu-ll_valuebound50.c[596,609] [2021-05-06 07:17:02,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:17:02,252 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:17:02,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02 WrapperNode [2021-05-06 07:17:02,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:17:02,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:17:02,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:17:02,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:17:02,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:17:02,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:17:02,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:17:02,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:17:02,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (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 07:17:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:17:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:17:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:17:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:17:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:17:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:17:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:17:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:17:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:17:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:17:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-06 07:17:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:17:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:17:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:17:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:17:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:17:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:17:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:17:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:17:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:17:02,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:17:02,583 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:17:02,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:17:02 BoogieIcfgContainer [2021-05-06 07:17:02,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:17:02,585 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:17:02,585 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:17:02,585 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:17:02,587 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:17:02" (1/1) ... [2021-05-06 07:17:02,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:17:02 BasicIcfg [2021-05-06 07:17:02,597 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:17:02,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:17:02,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:17:02,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:17:02,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:17:02" (1/4) ... [2021-05-06 07:17:02,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1618bb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:17:02, skipping insertion in model container [2021-05-06 07:17:02,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:17:02" (2/4) ... [2021-05-06 07:17:02,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1618bb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:17:02, skipping insertion in model container [2021-05-06 07:17:02,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:17:02" (3/4) ... [2021-05-06 07:17:02,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1618bb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:17:02, skipping insertion in model container [2021-05-06 07:17:02,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:17:02" (4/4) ... [2021-05-06 07:17:02,602 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.cJordan [2021-05-06 07:17:02,605 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:17:02,607 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:17:02,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:17:02,634 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:17:02,634 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:17:02,634 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:17:02,634 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:17:02,634 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:17:02,634 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:17:02,634 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:17:02,634 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:17:02,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:17:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:17:02,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:02,657 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:02,657 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:02,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2021-05-06 07:17:02,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:02,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502284164] [2021-05-06 07:17:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:02,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:17:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:02,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:17:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:17:02,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:02,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502284164] [2021-05-06 07:17:02,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502284164] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:17:02,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:17:02,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:17:02,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279107489] [2021-05-06 07:17:02,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:17:02,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:02,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:17:02,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:17:02,844 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:17:02,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:02,983 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-05-06 07:17:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:17:02,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 07:17:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:02,989 INFO L225 Difference]: With dead ends: 36 [2021-05-06 07:17:02,989 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 07:17:02,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:17:03,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 07:17:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 07:17:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:17:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-06 07:17:03,023 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-06 07:17:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:03,023 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-06 07:17:03,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:17:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-06 07:17:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:17:03,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:03,024 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:03,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:17:03,025 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:03,046 INFO L82 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2021-05-06 07:17:03,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:03,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358454861] [2021-05-06 07:17:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:03,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:17:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:17:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:17:03,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:03,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358454861] [2021-05-06 07:17:03,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358454861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:17:03,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:17:03,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:17:03,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693848743] [2021-05-06 07:17:03,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:17:03,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:17:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:03,197 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:17:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:03,410 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 07:17:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:17:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 07:17:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:03,412 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:17:03,412 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:17:03,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:17:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:17:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:17:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:17:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 07:17:03,417 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-06 07:17:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:03,417 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 07:17:03,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:17:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 07:17:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:17:03,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:03,418 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:03,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:17:03,418 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:03,419 INFO L82 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2021-05-06 07:17:03,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:03,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710299343] [2021-05-06 07:17:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:03,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:03,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848572263] [2021-05-06 07:17:03,428 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 07:17:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:03,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:17:03,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:03,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:17:03,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:03,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710299343] [2021-05-06 07:17:03,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:03,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848572263] [2021-05-06 07:17:03,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848572263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:17:03,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:17:03,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:17:03,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663465248] [2021-05-06 07:17:03,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:17:03,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:17:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:17:03,563 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:17:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:03,596 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-06 07:17:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:17:03,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 07:17:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:03,597 INFO L225 Difference]: With dead ends: 52 [2021-05-06 07:17:03,597 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 07:17:03,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 07:17:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-06 07:17:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:17:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-05-06 07:17:03,603 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2021-05-06 07:17:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:03,603 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-05-06 07:17:03,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:17:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-05-06 07:17:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:17:03,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:03,604 INFO L523 BasicCegarLoop]: trace histogram [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 07:17:03,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 07:17:03,810 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2021-05-06 07:17:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:03,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564557764] [2021-05-06 07:17:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:03,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:03,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363643952] [2021-05-06 07:17:03,818 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 07:17:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:03,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:17:03,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:03,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:17:03,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:03,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564557764] [2021-05-06 07:17:03,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:03,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363643952] [2021-05-06 07:17:03,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363643952] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:17:03,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:17:03,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:17:03,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177879909] [2021-05-06 07:17:03,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:17:03,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:17:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:17:03,924 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:17:03,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:03,961 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-06 07:17:03,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:17:03,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 07:17:03,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:03,963 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:17:03,963 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 07:17:03,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 07:17:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-05-06 07:17:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 07:17:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-05-06 07:17:03,968 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2021-05-06 07:17:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:03,968 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-05-06 07:17:03,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:17:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-05-06 07:17:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:17:03,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:03,969 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 07:17:04,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:04,189 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:04,190 INFO L82 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2021-05-06 07:17:04,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:04,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205562541] [2021-05-06 07:17:04,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:04,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:04,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569605530] [2021-05-06 07:17:04,197 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 07:17:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:04,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:17:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:04,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:17:04,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205562541] [2021-05-06 07:17:04,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:04,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569605530] [2021-05-06 07:17:04,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569605530] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:17:04,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:17:04,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:17:04,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551565815] [2021-05-06 07:17:04,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:17:04,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:04,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:17:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:17:04,341 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:17:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:04,424 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-05-06 07:17:04,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:17:04,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 07:17:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:04,426 INFO L225 Difference]: With dead ends: 64 [2021-05-06 07:17:04,426 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:17:04,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:04,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:17:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 07:17:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 07:17:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-06 07:17:04,430 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2021-05-06 07:17:04,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:04,430 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-06 07:17:04,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 07:17:04,430 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-06 07:17:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 07:17:04,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:04,431 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:04,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:04,640 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:04,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2021-05-06 07:17:04,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:04,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896365453] [2021-05-06 07:17:04,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:04,647 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:04,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635958526] [2021-05-06 07:17:04,647 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 07:17:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:17:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:04,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:17:04,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:04,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896365453] [2021-05-06 07:17:04,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:04,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635958526] [2021-05-06 07:17:04,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635958526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:04,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:04,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:17:04,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086247674] [2021-05-06 07:17:04,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:17:04,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:17:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:04,789 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:17:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:04,871 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-05-06 07:17:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:17:04,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-06 07:17:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:04,875 INFO L225 Difference]: With dead ends: 79 [2021-05-06 07:17:04,875 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 07:17:04,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:17:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 07:17:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-05-06 07:17:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 07:17:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-05-06 07:17:04,890 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 49 [2021-05-06 07:17:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:04,891 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-05-06 07:17:04,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 07:17:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-05-06 07:17:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 07:17:04,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:04,891 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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 07:17:05,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:05,092 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2021-05-06 07:17:05,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557650849] [2021-05-06 07:17:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:05,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:05,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107223893] [2021-05-06 07:17:05,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:05,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:17:05,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:05,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:17:05,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:05,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 07:17:05,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557650849] [2021-05-06 07:17:05,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:05,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107223893] [2021-05-06 07:17:05,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107223893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:05,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:05,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:17:05,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883333772] [2021-05-06 07:17:05,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:17:05,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:17:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:05,265 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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 07:17:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:05,345 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2021-05-06 07:17:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:17:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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 54 [2021-05-06 07:17:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:05,346 INFO L225 Difference]: With dead ends: 83 [2021-05-06 07:17:05,346 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 07:17:05,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:17:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 07:17:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-05-06 07:17:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 07:17:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-05-06 07:17:05,360 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 54 [2021-05-06 07:17:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:05,361 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-05-06 07:17:05,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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 07:17:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-05-06 07:17:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 07:17:05,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:05,365 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:05,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:17:05,566 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:05,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2021-05-06 07:17:05,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:05,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966525508] [2021-05-06 07:17:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:05,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:05,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406895930] [2021-05-06 07:17:05,573 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 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 07:17:05,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 07:17:05,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:05,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 07:17:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:05,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 07:17:05,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:05,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966525508] [2021-05-06 07:17:05,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:05,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406895930] [2021-05-06 07:17:05,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406895930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:05,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:05,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:17:05,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777799261] [2021-05-06 07:17:05,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:17:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:17:05,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:05,765 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 07:17:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:05,853 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2021-05-06 07:17:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:17:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-05-06 07:17:05,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:05,857 INFO L225 Difference]: With dead ends: 87 [2021-05-06 07:17:05,857 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 07:17:05,857 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:17:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 07:17:05,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 07:17:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 46 states have internal predecessors, (47), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:17:05,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-05-06 07:17:05,867 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 59 [2021-05-06 07:17:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:05,868 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-05-06 07:17:05,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 07:17:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-05-06 07:17:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 07:17:05,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:05,869 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:06,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:06,077 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:06,077 INFO L82 PathProgramCache]: Analyzing trace with hash 766739444, now seen corresponding path program 4 times [2021-05-06 07:17:06,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:06,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433959161] [2021-05-06 07:17:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:06,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:06,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112452997] [2021-05-06 07:17:06,084 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 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 07:17:06,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:17:06,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:06,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:17:06,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:06,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 07:17:06,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:06,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433959161] [2021-05-06 07:17:06,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:06,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112452997] [2021-05-06 07:17:06,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112452997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:06,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:06,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:17:06,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223599373] [2021-05-06 07:17:06,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:17:06,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:06,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:17:06,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:17:06,254 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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 07:17:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:06,322 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-05-06 07:17:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:17:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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 64 [2021-05-06 07:17:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:06,323 INFO L225 Difference]: With dead ends: 90 [2021-05-06 07:17:06,323 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 07:17:06,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:17:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 07:17:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 07:17:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 07:17:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-06 07:17:06,327 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 64 [2021-05-06 07:17:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:06,327 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-06 07:17:06,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (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 07:17:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-06 07:17:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 07:17:06,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:06,328 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:06,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:06,535 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2021-05-06 07:17:06,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:06,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950158451] [2021-05-06 07:17:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:06,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:06,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771137001] [2021-05-06 07:17:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 07:17:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:06,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 07:17:06,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:06,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950158451] [2021-05-06 07:17:06,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:06,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771137001] [2021-05-06 07:17:06,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771137001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:06,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:06,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:17:06,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042132539] [2021-05-06 07:17:06,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:17:06,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:06,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:17:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:17:06,775 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:17:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:06,857 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-05-06 07:17:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:17:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-06 07:17:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:06,858 INFO L225 Difference]: With dead ends: 93 [2021-05-06 07:17:06,858 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 07:17:06,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:17:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 07:17:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 07:17:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 07:17:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-05-06 07:17:06,865 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 75 [2021-05-06 07:17:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:06,866 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-05-06 07:17:06,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 07:17:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-05-06 07:17:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 07:17:06,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:06,867 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:07,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 07:17:07,073 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2023420382, now seen corresponding path program 5 times [2021-05-06 07:17:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:07,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462515096] [2021-05-06 07:17:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:07,080 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:07,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640385902] [2021-05-06 07:17:07,080 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 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 07:17:07,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 07:17:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 07:17:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:07,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 07:17:07,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:07,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462515096] [2021-05-06 07:17:07,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:07,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640385902] [2021-05-06 07:17:07,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640385902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:07,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:07,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:17:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064341780] [2021-05-06 07:17:07,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:17:07,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:17:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:17:07,354 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:17:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:07,636 INFO L93 Difference]: Finished difference Result 114 states and 136 transitions. [2021-05-06 07:17:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:17:07,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 76 [2021-05-06 07:17:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:07,638 INFO L225 Difference]: With dead ends: 114 [2021-05-06 07:17:07,638 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 07:17:07,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 07:17:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 07:17:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-05-06 07:17:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 60 states have internal predecessors, (60), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:17:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-05-06 07:17:07,642 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 76 [2021-05-06 07:17:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:07,642 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-05-06 07:17:07,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:17:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-05-06 07:17:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 07:17:07,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:07,643 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:07,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:07,844 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:07,844 INFO L82 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2021-05-06 07:17:07,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:07,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258020350] [2021-05-06 07:17:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:07,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268193552] [2021-05-06 07:17:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:17:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:17:07,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:07,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:07,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 07:17:08,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:08,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258020350] [2021-05-06 07:17:08,163 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:08,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268193552] [2021-05-06 07:17:08,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268193552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:08,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:08,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:17:08,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720449308] [2021-05-06 07:17:08,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:17:08,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:08,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:17:08,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:17:08,164 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 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 07:17:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:08,248 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2021-05-06 07:17:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:17:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 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 80 [2021-05-06 07:17:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:08,250 INFO L225 Difference]: With dead ends: 107 [2021-05-06 07:17:08,250 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 07:17:08,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:17:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 07:17:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 07:17:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 56 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:17:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-05-06 07:17:08,253 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 80 [2021-05-06 07:17:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:08,254 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-05-06 07:17:08,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 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 07:17:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-05-06 07:17:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 07:17:08,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:08,254 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:08,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:08,472 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:08,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 6 times [2021-05-06 07:17:08,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:08,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70216095] [2021-05-06 07:17:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:08,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:08,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841533317] [2021-05-06 07:17:08,478 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 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 07:17:08,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 07:17:08,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:08,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 07:17:08,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:08,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 82 proven. 17 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 07:17:08,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70216095] [2021-05-06 07:17:08,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:08,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841533317] [2021-05-06 07:17:08,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841533317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:08,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:08,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:17:08,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805113047] [2021-05-06 07:17:08,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:17:08,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:17:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:17:08,721 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:17:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:09,188 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2021-05-06 07:17:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:17:09,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2021-05-06 07:17:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:09,190 INFO L225 Difference]: With dead ends: 110 [2021-05-06 07:17:09,190 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 07:17:09,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:17:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 07:17:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-06 07:17:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 59 states have internal predecessors, (59), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 07:17:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 07:17:09,193 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2021-05-06 07:17:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:09,193 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 07:17:09,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 07:17:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 07:17:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 07:17:09,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:09,194 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:09,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 07:17:09,395 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:09,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1552787842, now seen corresponding path program 7 times [2021-05-06 07:17:09,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:09,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377913161] [2021-05-06 07:17:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:09,400 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:09,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307127583] [2021-05-06 07:17:09,401 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 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 07:17:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:17:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 07:17:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:09,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 07:17:09,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:09,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377913161] [2021-05-06 07:17:09,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:09,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307127583] [2021-05-06 07:17:09,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307127583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:09,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:09,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:17:09,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919402864] [2021-05-06 07:17:09,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:17:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:17:09,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:17:09,604 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:17:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:09,710 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-05-06 07:17:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:17:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 86 [2021-05-06 07:17:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:09,711 INFO L225 Difference]: With dead ends: 114 [2021-05-06 07:17:09,711 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 07:17:09,711 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:17:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 07:17:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 07:17:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 07:17:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-06 07:17:09,714 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2021-05-06 07:17:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:09,715 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-06 07:17:09,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 07:17:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-06 07:17:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 07:17:09,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:09,715 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:09,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 07:17:09,929 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:09,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:09,929 INFO L82 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2021-05-06 07:17:09,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:09,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227329850] [2021-05-06 07:17:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:09,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:09,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018707991] [2021-05-06 07:17:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:09,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:17:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 07:17:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:10,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 07:17:10,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:10,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227329850] [2021-05-06 07:17:10,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:10,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018707991] [2021-05-06 07:17:10,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018707991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:10,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:10,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:17:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754667065] [2021-05-06 07:17:10,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:17:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:17:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:17:10,237 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:17:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:10,343 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2021-05-06 07:17:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:17:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-05-06 07:17:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:10,344 INFO L225 Difference]: With dead ends: 115 [2021-05-06 07:17:10,344 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 07:17:10,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:17:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 07:17:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-06 07:17:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 07:17:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-06 07:17:10,347 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2021-05-06 07:17:10,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:10,347 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-06 07:17:10,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:17:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-06 07:17:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 07:17:10,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:10,348 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:10,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:10,553 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:10,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:10,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1591187207, now seen corresponding path program 8 times [2021-05-06 07:17:10,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:10,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331764799] [2021-05-06 07:17:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:10,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:10,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738905371] [2021-05-06 07:17:10,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:10,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:17:10,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 07:17:10,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:10,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 07:17:10,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:10,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331764799] [2021-05-06 07:17:10,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:10,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738905371] [2021-05-06 07:17:10,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738905371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:10,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:10,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:17:10,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767601000] [2021-05-06 07:17:10,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:17:10,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:10,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:17:10,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:17:10,760 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:17:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:10,890 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2021-05-06 07:17:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:17:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 103 [2021-05-06 07:17:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:10,891 INFO L225 Difference]: With dead ends: 140 [2021-05-06 07:17:10,891 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 07:17:10,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:17:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 07:17:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2021-05-06 07:17:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 77 states have internal predecessors, (77), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 07:17:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2021-05-06 07:17:10,895 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 103 [2021-05-06 07:17:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:10,895 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2021-05-06 07:17:10,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 07:17:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2021-05-06 07:17:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 07:17:10,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:10,896 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:11,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:11,109 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2021-05-06 07:17:11,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:11,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932803890] [2021-05-06 07:17:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:11,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:11,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725692907] [2021-05-06 07:17:11,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 07:17:11,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:17:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 07:17:11,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:11,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 07:17:11,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932803890] [2021-05-06 07:17:11,356 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725692907] [2021-05-06 07:17:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725692907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:17:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169724584] [2021-05-06 07:17:11,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:17:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:11,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:17:11,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:17:11,357 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 07:17:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:11,470 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2021-05-06 07:17:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:17:11,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2021-05-06 07:17:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:11,472 INFO L225 Difference]: With dead ends: 134 [2021-05-06 07:17:11,473 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 07:17:11,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:17:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 07:17:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-06 07:17:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 71 states have (on average 1.028169014084507) internal successors, (73), 73 states have internal predecessors, (73), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 07:17:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2021-05-06 07:17:11,476 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2021-05-06 07:17:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:11,476 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2021-05-06 07:17:11,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 07:17:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2021-05-06 07:17:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 07:17:11,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:11,477 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:11,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 07:17:11,694 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1186188245, now seen corresponding path program 9 times [2021-05-06 07:17:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:11,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106019648] [2021-05-06 07:17:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:11,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:11,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277406224] [2021-05-06 07:17:11,708 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 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 07:17:11,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:17:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 07:17:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 202 proven. 4 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2021-05-06 07:17:12,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:12,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106019648] [2021-05-06 07:17:12,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:12,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277406224] [2021-05-06 07:17:12,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277406224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:12,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:12,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:17:12,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652473394] [2021-05-06 07:17:12,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:17:12,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:12,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:17:12,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:17:12,222 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 07:17:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:13,520 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-05-06 07:17:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:17:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 108 [2021-05-06 07:17:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:13,521 INFO L225 Difference]: With dead ends: 127 [2021-05-06 07:17:13,521 INFO L226 Difference]: Without dead ends: 124 [2021-05-06 07:17:13,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:17:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-06 07:17:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-05-06 07:17:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 74 states have (on average 1.027027027027027) internal successors, (76), 76 states have internal predecessors, (76), 28 states have call successors, (28), 22 states have call predecessors, (28), 21 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:17:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2021-05-06 07:17:13,524 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 108 [2021-05-06 07:17:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:13,525 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2021-05-06 07:17:13,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 07:17:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2021-05-06 07:17:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 07:17:13,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:13,525 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:13,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:17:13,732 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:13,732 INFO L82 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2021-05-06 07:17:13,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:13,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848174027] [2021-05-06 07:17:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:13,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:13,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750628237] [2021-05-06 07:17:13,739 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 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 07:17:14,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 07:17:14,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 07:17:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:14,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2021-05-06 07:17:14,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:17:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848174027] [2021-05-06 07:17:14,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:17:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750628237] [2021-05-06 07:17:14,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750628237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:17:14,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:17:14,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 07:17:14,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634999450] [2021-05-06 07:17:14,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 07:17:14,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:17:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 07:17:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:17:14,634 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 07:17:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:17:15,763 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2021-05-06 07:17:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 07:17:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) Word has length 129 [2021-05-06 07:17:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:17:15,764 INFO L225 Difference]: With dead ends: 128 [2021-05-06 07:17:15,765 INFO L226 Difference]: Without dead ends: 126 [2021-05-06 07:17:15,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-06 07:17:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-06 07:17:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-05-06 07:17:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.013157894736842) internal successors, (77), 77 states have internal predecessors, (77), 28 states have call successors, (28), 23 states have call predecessors, (28), 21 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 07:17:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2021-05-06 07:17:15,769 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 129 [2021-05-06 07:17:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:17:15,769 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2021-05-06 07:17:15,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 07:17:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2021-05-06 07:17:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 07:17:15,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:17:15,770 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:17:15,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 07:17:15,978 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:17:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:17:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2021-05-06 07:17:15,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:17:15,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324831078] [2021-05-06 07:17:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:17:15,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:17:15,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968653852] [2021-05-06 07:17:15,983 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 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 07:17:16,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 07:17:16,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:17:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 07:17:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:17:16,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:16,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:17:17,228 WARN L159 QuantifierPusher]: Ignoring assumption.